Jason J. Winkler
Executive Vice President and Chief Financial Officer at Motorola Solutions
Thank you, Greg. Our Q4 results included revenue of $2.3 billion, up 2%, including $10 million from acquisitions and $6 million from favorable currency. GAAP operating earnings of $549 million and operating margins of 23.7% compared to 24.4% in the year ago quarter. Non-GAAP operating earnings of $670 million, up $3 million and non-GAAP operating margins of 28.9%, down 40 basis points due to higher operating expenses for employee incentive compensation and acquisitions.
Operating margin in Products and Systems Integration was down 170 basis points due to lower sales and higher operating expenses, partially offset by higher sales and improved operating leverage in the Software and Services segment.
GAAP earnings per share of $2.30 compared to $2.37 in the year ago quarter. Non-GAAP earnings per share of $2.85 versus $2.86 last year with higher sales and improved operating leverage in Software and Services, offset by, within the Products and Systems Integration segment, higher opex related to incentives and acquisitions, along with lower sales.
Opex in Q4 was $518 million, up $26 million versus last year, primarily due to higher employee incentive compensation and acquisitions. The Q4 effective tax rate was 22.3% compared to 21% in the prior year.
For the full year of 2021, revenue was $8.2 billion, up 10%, with growth in both segments and across all three technologies. Revenue from acquisitions was $120 million and the FX impact was $130 million favorable during the year. GAAP operating earnings were $1.7 billion or 20.4% of sales versus 18.7% in the prior year. The increase was primarily driven by higher sales and improved operating leverage. Non-GAAP operating earnings were $2.1 billion, up $282 million, and non-GAAP operating margins were 25.9% of sales, up from 24.8% of sales in the prior year, driven by higher sales and improved operating leverage. This increase in profitability also includes $100 million of higher employee incentive compensation earned in 2021.
GAAP earnings per share was $7.17 compared to $5.45 in the prior year, driven by higher sales, improved leverage, higher other income and lower reorganization charges in the current year. Non-GAAP earnings per share was $9.15, up 19% from $7.69 in 2020 on higher sales, higher operating earnings, higher other income, which was partially offset by a higher tax rate. For the full year, opex was $1.9 billion, up $123 million versus last year, primarily driven by higher employee incentive compensation and acquisitions. And the effective tax rate for 2021 was 21% compared to 20% in the prior year on higher benefits from discrete items, including the benefits of stock comp expense booked in the prior year.
Turning to cash flow. Q4 operating cash flow was $703 million, flat versus the prior year and free cash flow was $635 million versus $637 million in the prior year. And for the full year, OCF was a record $1.8 billion compared to $1.6 billion in the prior year, and free cash flow was a record $1.6 billion versus $1.4 billion in the prior year. The increase in cash flow was driven by higher sales, higher earnings and partially offset by higher cash taxes.
Capital allocation for 2021 included $528 million of share repurchases at an average price of $208.41, $482 million in cash dividends and $457 million for acquisitions. Additionally, during the year, we issued $850 million of new long-term debt, redeemed $324 million of outstanding debt, entered into a new upsized $2.25 billion revolving credit facility and ended the year with $1.9 billion of cash and a net debt to adjusted EBITDA ratio of only 1.6. We also increased our dividend 11%, our 11th consecutive year of a double-digit increase, and we announced a $2 billion increase to our share repurchase program in the second quarter.
Moving to our segment results. Q4 Products and Systems Integration sales were $1.5 billion, down 1%, which was impacted by the supply constraints we discussed on the last call. Growth in video security and public safety LMR was offset by a decline in PCR and revenue from acquisitions in the quarter was $4 million. Operating earnings were $378 million or 25.3% of sales, down from 27% in the prior year, driven by higher employee incentive compensation and lower sales.
Some notable Q4 wins and achievements in this segment include a $98 million P25 upgrade for the Commonwealth of Massachusetts, $94 million of APX NEXT device orders in North America, a $68 million P25 device upgrade for the District of Columbia, a $28 million P25 upgrade for a large U.S. customer, a $21 million fixed video security order for a large North America utility customer, a $19 million additional TETRA order from the German MOD and a $17 million TETRA device upgrade for a customer in Asia Pacific.
And for the full year, revenue was $5 billion, up 9% from the prior year, driven by higher sales of LMR and higher sales of video security. Revenue from acquisitions was $89 million. Operating earnings were $976 million or 19.4% of sales, up from 19% in the prior year on higher sales, partially offset by higher opex.
Moving next to our Software and Services segment. Q4 revenue was $824 million, up 8% from last year, driven by growth in LMR services, video security software and command center software. Revenue from acquisitions in the quarter was $6 million. Operating earnings were $292 million or 35.4% of sales, up 150 basis points from last year, driven by higher sales and improved leverage.
Some notable Q4 wins in this segment include a $25 million P25 multiyear services contract with Cook County, Illinois, a $17 million P25 multiyear software upgrade agreement for ICI Systems Authority in California; a $17 million body-worn camera as a service order for the City of Houston, Texas Police Department; a $15 million P25 multiyear software upgrade for Orange County, California; and a $14 million additional body-worn camera order for the French MOI; a $11 million command center software hybrid cloud order for North Carolina Department of Public Safety, and we saw a 27% growth in software for video security and access control.
For the full year, revenue was $3.1 billion, up 13% on growth in LMR services, video security and command center software. Revenue from acquisitions was $31 million. Operating earnings were $1.1 billion or 36.4% of sales, up 210 basis points versus the prior year, driven by higher sales and improved leverage.
Looking at regional results. North America Q4 revenue was $1.6 billion, up 4% on growth in video security and LMR products and services. For the full year, North America revenue was $5.6 billion, up 11%, with growth in both segments and across all three technologies. International Q4 was $705 million, down 3% due to a decline in LMR, partially offset with growth in video security and command center software.
We saw growth in Latin America during the quarter, while EMEA was flat and Asia Pac declined. For the full year, international revenue was $2.6 billion, up 9% with growth in both segments and across all three technologies. Revenue was up in EMEA and Latin America, offset by a slight decline in Asia Pac.
Moving to our backlog. Ending backlog was a record $13.6 billion, up $2.2 billion compared to last year, driven by the U.K. Home Office's exercise of their contractual right to extend the Airwave network four years through 2026, along with record LMR product orders and growth in Software and Services contracts in North America. Sequentially, backlog was up $2.2 billion driven by the Airwave extension and record LMR product orders in North America during the fourth quarter.
Software and Services backlog was up $1.3 billion compared to last year and up $1.8 billion sequentially, driven by the Airwave extension and growth in Software and Services agreements in North America.
Products and SI backlog was up $886 million compared to last year, driven by record LMR orders. Sequentially, backlog was up $417 million, driven by record LMR orders in North America during the fourth quarter.
Turning next to our outlook for 2022. For the full year, we expect sales to be up approximately 7%, with mid-single-digit growth in products and systems integration and approximately 10% growth in Software and Services. And we expect full year non-GAAP earnings per share between $9.80 and $9.95. This outlook assumes FX at current rates, a weighted average diluted share count of approximately 174 million shares and an effective tax rate of 21% to 22%. It also assumes $120 million of higher material costs, largely driven by the current semiconductor market dynamics of limited supply and us procuring available parts at a premium from other secondary markets. Additionally, we expect pricing adjustments to our portfolio, which we have recently made to take effect as we progress in fulfilling existing backlog.
For Q1, we expect sales to be up approximately 3%, with non-GAAP EPS between $1.53 and $1.59 per share, inclusive of $50 million of the incremental material costs I referenced for the year. It also assumes FX at current rates, a weighted average diluted share count between 173 million and 174 million shares and an effective tax rate of approximately 17%.
We expect full year operating cash flow of approximately $1.9 billion. This OCF outlook include $75 million of higher employee incentive payments earned in 2021 and $150 million of higher cash taxes, half of which is driven by the U.S. federal tax requirement to capitalize R&D beginning in 2022. And for the full year, we will continue to be diligent in our cost management.
We expect opex to be up approximately $100 million from last year, driven by investments in video security and command center software, inclusive of $40 million related to recent acquisitions.
I would now like to turn the call back over to Greg.