Christa Davies
Chief Financial Officer and Executive Vice President of Global Finance at AON
Thanks so much Greg, and good morning everyone. As Greg highlighted, we delivered strong operating results in the fourth quarter to finish the year strong. In the quarter, we translated 7% organic revenue growth into 60 basis points of adjusted operating margin expansion and 10% adjusted operating income growth. The full year 2023, we delivered 7% organic revenue growth, 80 basis points of margin expansion, 6% EPS growth and generated $3.2 billion of free cash flow. In the quarter, we knocked out definitive agreement to acquire leading broker NFP, enabling us to unlock the fast-growing mid-markets with Aon Business Services enabled enhanced distribution and further accelerate our Aon United strategy.
The steps that we've taken around Aon Business Services now enables us to address this attractive market in a compelling way that delivers risk capital and human capital at scale to clients of all sizes. The expected acquisition of NFP built on our long-term proven track record of strategically allocating capital at scale to high return opportunities to create long-term value for clients, colleagues and shareholders. And as Greg mentioned, we see the expected acquisition and our restructuring program, reinforcing our Aon United Strategy and our three-by-three plan. We are extremely well-positioned to build on this momentum as we head into 2024.
As I reflect on our results, as Greg noted, organic revenue growth was 7% in Q4 and for the full-year, highlighted by double-digit organic revenue growth in Reinsurance Solutions and Health Solutions. I would note that reported revenue growth of 8% in Q4 includes this favorable impact from changes in FX of 2%, and there is no net impact from changes in FX to full-year reported revenue. I'd also highlight fiduciary investment income, which is not included in organic revenue growth, was $78 million in Q4 and $274 million for the full-year. If you were to include fiduciary investment income, organic revenue growth would have been 8% in both Q4 and the full-year. We continue to expect mid-single-digit or greater organic revenue growth for the full-year 2024 and over the long-term.
Moving to operating performance. We delivered strong operational improvement in Q4 with adjusted operating margins of 33.8%, an increase of 60 basis-points, driven by revenue growth, efficiencies from Aon Business Services, overcoming expense growth, including investment in colleagues and technology to drive long-term growth. For the full-year, adjusted operating margins of 31.6% reflect margin expansion of 80 basis points. As previously communicated, there was no impact on margin from restructuring savings.
Looking forward, we expect to deliver margin expansion in 2024 and over the long-term, as we continue our track-record of cost discipline and managing investments in long-term growth on ROIC basis. We expect restructuring savings will fall to the bottom-line and contribute to full-year adjusted operating margin expansion. Restructuring actions completed in 2023 are expected to generate $70 million of run-rate savings in 2024. At this time, we continue to expect a $100 million of run-rate savings in 2024 as we continue to execute against our plans at Aon Business Services and our business.
As we've previously communicated, we conservatively modeled the expected acquisition of NFP to close mid-year 2025. While the combined adjusted operating margin will initially be lower than Aon standalone, we expect over time to continue to improve Aon's overall margins through operational improvement and the impacts from previously communicated cost synergies.
Turning to EPS. Adjusted EPS was flat in Q4. Operating income grew 10%, but was offset by a headwind from a higher tax-rate in the quarter and non-operating expense. For the full-year, organic revenue growth and margin expansion translated into adjusted EPS growth of 6%, overcoming a headwind from non-operating expense. I'd note, the change in other non-operating expense had a $0.15 per share or 4% unfavorable impact in Q4 and a $0.98 per share or 7% unfavorable impact for the full-year. This reflects an unfavorable impact from balance sheet FX remeasurement in the current period, an increase in non-cash net periodic pension expense, as well as a gain on sale of businesses in the prior year period. Also, as noted in our earnings materials, FX translation had a favorable impact or approximately $0.03 per share in Q4 and an unfavorable impact of $0.17 per share for the full-year. If currency to remain stable at today's rates, we would expect no material net translation impact results for the full-year 2024. Additionally, in 2024 we expect non-cash pension expense NOI to be $43 million, spread evenly across quarters, compared to $71 million in 2023. And as we've previously communicated based on a mid-2025 close, the expected acquisition of NFP is expected to be dilutive in 2025, breakeven to adjusted 2026 EPS and accretive in 2027 and beyond. At this time, there are no further updates on the regulatory process or deal timeline for NFP.
Turning to free-cash flow, we generated $3.3 billion of free-cash flow in 2023. For the full-year, cash from operations increased $216 million Year-over-Year, or 7%, reflecting double-digit operating income growth and overall working capital optimization, partially offset by higher cash tax payments. I'd note, the negative impact to working capital, caused by temporary invoicing delays associated with the new system implementation, which we communicated last quarter persisted in Q4 and impacted our overall continued progress on working capital. Free-cash flow increased 5% as cash-flow from operations was offset in-part by a $56 million or 29% increase in capex. Capex was $252 million in 2023 as we executed technology projects to drive long-term growth. Going forward, we expect capex to grow in-line with the business managed on a disciplined ROIC basis. Looking forward, free-cash flow will be impacted in the near-term by restructuring, higher interest expense and the expected NFP deal and integration costs. We expect to return to our trajectory of double-digit free-cash flow growth over the long-term, driven by operating income growth and a $500 million opportunity in working capital. As we contemplate the expected acquisition of NFP, the transaction strengthens our long-term free-cash flow outlook. We expect the transaction to add over $300 million of free-cash flow in 2026 and $600 million of free-cash flow in 2027.
Now let me provide an update on our accelerating Aon United program which is enabling Aon Business Services and our three-by-three plan. As Greg highlighted, three-by-three plan is accelerating our Aon United strategy. We see particular opportunity around Aon Business Services as the catalyst. We are investing to standardized platforms and operations, drive data analytic-based product innovation and deliver at scale to create better tools, better experiences and greater relevance to clients and colleagues. In the fourth quarter, we incurred a $129 million of restructuring-related charges with a cash outflow of $13 million. We're pleased with the progress we made in the quarter and we've incurred 12% of total expected cash restructuring charges. The actions we've taken in 2023 are expected to generate $70 million of run-rate savings in 2024, contributing to the $100 million of cumulative savings we expect for full-year 2024. As mentioned, program savings were not material in 2023. As we've said previously, we look at the opportunity in Aon Business Services and across our client-facing capabilities. We now are delivering our strategy will result in long-term progress against our key financial metrics and will drive more value for clients, colleagues and shareholders.
Turning now to capital allocation. We allocate capital based on return on capital and long-term value creation. I'd note, over time, we've driven value creation through core business results, share buyback and acquisitions. As you look historically, we have a successful track record of balancing acquisitions and dispositions of all sizes and share buyback. Given our strong outlook for free-cash flow over the long-term, we expect share repurchases to continue to remain our highest-return on capital opportunity for meaningful ongoing capital allocation. We believe we are significantly undervalued in the market today, highlighted by the $2.7 billion of share repurchase in 2023. We expect to continue to invest organically in content and capabilities we can scale across the firm and we'll continue to assess priority as inorganic investments noting our M&A pipeline continues to be focused on our global priority areas that will bring scalable solutions to our clients growing and evolving challenges. We will continue to assess all capital allocation decisions on an ROIC basis. Noting we ended 2023 with an ROIC of 33.1%, an increase of nearly 2,100 basis-points over the last 12 years, reflecting our track record of balancing growth and returns to create long-term value.
I'd note ROIC will initially be negatively impacted after the expected acquisition of NFP. We expect it to improve over time as we execute our Aon United strategy to drive long-term value creation. Our expected acquisition of NFP is consistent with our proven capital allocation framework. It enables us to put capital to work at-scale and strengthen our free-cash flow profile in the long-term, which will continue to allocate to drive shareholder value creation. Between now and the expected close of the deal, we expect discretionary capital allocation will continue to be much more weighted towards share buyback, given the commitments we've made around NFP. Following the expected close of NFP, free-cash flow will be impacted in the near-term by deal and integration costs and higher interest expense, transaction-related debt, and as we take steps to delever our balance sheet and return metrics to levels consistent with our current credit ratings profile.
Turning now to our balance sheet and debt capacity. We remain confident in the strength of our balance sheet and manage liquidity risk through a well-laddered debt maturity profile. We remain committed to maintaining our current investment grade credit ratings. We expect to continue adding debt supported by EBITDA growth until we complete the expected acquisition of NFP and expect to maintain our current ratings. As we've previously communicated, we expect to fund the cash portion of the purchase with approximately $7 billion of new debt with $2 billion brought at close and $5 billion raised in 2024 across a range of maturities, subject to market conditions. Following the transaction related debt issuance in 2024, we expect to incur approximately $12.5 million of negative interest carry expense per quarter until deal close. As we previously communicated, the financing and capital management plan contemplated in this transaction is consistent with maintaining our current investment grade credit profile. We expect our credit ratios to be elevated over the 12 to 18 months post close. And we expect to bring our leverage ratios back in line with levels consistent with our credit profile, driven by substantial free cash flow generation and incremental debt capacity from EBITDA growth noting our track-record of effectively managing leverage within current ratings.
In summary, in 2023, we delivered strong operational performance contributing to continued progress against our Aon United strategy. Our strong financial results and disciplined capital management enables us to return to $3.2 billion to shareholders through share repurchases and dividends. The steps we've taken around our three-by-three plan are accelerating our Aon United strategy catalyzed by Aon Business Services and reinforced by the restructuring program and our expected acquisition of NFP. We remain incredibly excited about the opportunity to continue to drive top and bottom-line results to drive value for clients, colleagues and shareholders and look forward to building on this momentum in 2024.
With that, I'll turn the call-back over to the operator and we'd be delighted to take your questions.