Marie Myers
Analyst · Morgan Stanley
Thank you, Enrique, for the kind introduction. It's great to be with all of you today.
Q4 was a strong finish against a tough 2020 backdrop. With that said, our performance reflected the company's multiple profit levers, solid execution and resiliency. Before diving further into Q4, let me quickly recap FY '20 for the full year.
We delivered revenue of $56.6 billion, down 2% in constant currency. We grew non-GAAP EPS 2%, which continues our trend of growing non-GAAP EPS every year since separation.
We generated $3.9 billion of free cash flow, above our full year guidance. And we returned $4.1 billion, or 105% of free cash flow, to shareholders. Importantly, we've delivered these results while investing in our business for future growth and efficiency during the global pandemic.
Our foundation is strong, including our balance sheet, and we have multiple levers to create value for our shareholders.
Now let's look at the details of the fourth quarter. Q4 net revenue was $15.3 billion, down 1% year-on-year, or flat in constant currency. Regionally, in constant currency, Americas increased 4%, EMEA decreased 1% and APJ decreased 6%. Gross margin was 17.6%, down 1.4 points year-on-year. The decline was due to a combination of a higher consumer mix within both Personal Systems and print hardware and lower rate in commercial print. Non-GAAP operating expenses were $1.6 billion, down $169 million. The decline in operating expenses was driven by our ongoing cost efficiency program as part of our transformation efforts as well as a reduction in discretionary costs.
Non-GAAP net OI&E expense was $60 million for the quarter. Non-GAAP diluted net earnings per share increased 3% to $0.62, with a diluted share count of approximately 1.4 billion shares. Non-GAAP diluted net earnings per share excludes a net expense totaling $167 million related to onetime defined benefit plan settlement charges, amortization of intangible assets, restructuring and other charges and partially offset by nonoperating retirement-related credits and other tax adjustments. As a result, Q4 GAAP diluted net earnings per share was $0.49.
Turning to segment performance. In Q4, Personal Systems benefited from solid demand related to working and learning from home with revenue of $10.4 billion, flat as reported, or up 1% in constant currency. Our top line remained constrained due to industry-wide supply shortages in CPUs and panels. Drilling into the details, we saw differing results by customer segment, with consumer revenue up 24%, while commercial revenue was down 12%. By product category, revenue was up 18% for notebooks, down 28% for desktops and down 45% for workstations. The change in mix reflected the strong demand for notebooks, mainly in Chromebooks, which represented 20% of our total Personal Systems units as working and learning from home continued.
Personal Systems delivered $528 million in operating profit and operating margins of 5.1%, in line with our outlook and at the high end of our long-term range of 3.5% to 5.5%. Our results reflected the impact of a higher consumer segment mix within our portfolio and lower commercial rate, which were partially offset by cost reductions.
In print, our results reflected strong execution and the team's agility as we continue to see a trade-off in demand between home and office print due to the pandemic. Within commercial office print, we did see some improvement driven by SMB. Importantly, HP remains uniquely well positioned in the print market by being a leader across both home and office with portfolio depth and resiliency to navigate these uncertain times.
Q4 total print revenue was $4.8 billion, down 3% nominally and 2% in constant currency. By customer segment, consumer hardware revenue was up 21%, with units up 18% and commercial hardware revenue was down 22% on a 10% reduction in units. In total, hardware units were up 14% to 11.8 million units, a record since we became a separate company.
Supplies revenue was $3.1 billion, flat in constant currency. In the fourth quarter, lower commercial printing was offset by consumer demand due to work- and learn-from-home, and disciplined pricing as well as replenishment of stock at our channel partners as product availability improved. Tier 1 channel inventory levels remained below the ceiling.
Print operating profit was $713 million, and operating margins were 14.8%. The year-over-year decline was due to lower commercial print hardware rate and strong consumer hardware shipments, partially offset by strong supplies performance and OpEx reductions.
Now let me turn to our cost savings and transformation efforts. We finished FY '20 ahead of the first year cost reduction target, which is 40% of our 3-year $1.2 billion gross run rate structural cost reduction plan. During this dynamic environment, we are also reducing discretionary costs as much as possible, even though they are more temporary in nature. To illustrate, we've seen significant operating expense reductions throughout the year, with Q4 non-GAAP OpEx as a percentage of revenue at 10.7%.
We are focused on continuing to dive deeper into our transformational efforts. As an example, in FY '20, we have taken site optimization actions by exiting over 30 real estate sites to align with our location and mobility strategy. In addition, we have seen efficiency improvement in our customer service and support, driven by our continued shift to digital, which resulted in an over 300% year-over-year increase in virtual agent interactions in the second half of 2020.
Finally, we continue to make progress in our new partner program, Amplify, which we announced last quarter to enable enhanced data analytics and provide partners with the capabilities, tools and insights required to capitalize on opportunities across the portfolio.
As we head into FY '21, we are focused on further digital enablement and driving a lean cost structure because we believe it enables top and bottom line growth.
Shifting to cash flow and capital allocation. Q4 cash flow from operations and free cash flow were strong at $1.9 billion and $1.8 billion, respectively. The stronger-than-expected cash flow was driven by higher earnings and contributions from working capital. For Q1, we expect free cash flow to be softer than Q4, in line with typical seasonal patterns. In Q4, the cash conversion cycle was minus 30 days. Sequentially, the cash conversion cycle was flat as normalized purchasing and sales drove decreases in days of inventory and days sales outstanding, offset by decreases in days payable outstanding.
We returned $1.3 billion to shareholders through share repurchases and $238 million via cash dividends in Q4. For the year, we have returned a total of $4.1 billion, which represented 105% of free cash flow and a year-over-year increase of 22%.
Today, we announced that we are increasing our dividend by 10%.
Looking forward, we expect to continue buying back shares at elevated levels of at least $1 billion per quarter in the coming quarters.
Heading into Q1, keep the following in mind related to our overall financial outlook. We expect macroeconomic conditions to be more uncertain as the impact of the COVID-19 pandemic continues to evolve.
Turning to specific Personal Systems assumptions. Our backlog remains elevated and higher than the previous quarter, but we expect industry-wide CPU, panel and semiconductor constraints to continue to negatively impact our ability to meet demand, especially for notebooks, which will constrain top line growth. We expect continued strong demand in consumer and education pressure in commercial, particularly desktops and workstations. We expect the cost from the overall basket of commodities to be similar to Q4 levels. And from a margin perspective, we expect Q1 operating margins to be similar to Q4.
In printing, from a demand perspective due to the pandemic, we expect to continue to see the positive demand for home printing, offset by more competitive pricing in home printing as well as continued economic pressure on commercial printing. We expect to continue to navigate the supply constraints with a focus on appropriately replenishing stock so that our partners are well positioned to satisfy demand. We expect our operating margin for Q1 to get into the long-term range of 16% to 18%.
Taking these considerations into account, we are providing the following guidance for Q1. We expect first quarter non-GAAP diluted net earnings per share to be in the range of $0.64 to $0.70. And first quarter GAAP diluted net earnings per share to be in the range of $0.58 to $0.64.
And now I would like to hand it back to the operator and open the call for your questions.