Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating activities
Net income	$ 53	$ 168
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	39	42
Stock-based compensation expense	21	21
Deferred income taxes	10	(149)
Changes in assets and liabilities:
Receivables	(36)	(50)
Inventories	13	3
Current payables and accrued expenses	(44)	(43)
Deferred revenue	63	66
Other assets and liabilities	(9)	(48)
Net cash provided by operating activities	110	10
Investing activities
Expenditures for property and equipment	(4)	(10)
Additions to capitalized software	(1)	(2)
Net cash used in investing activities	(5)	(12)
Financing activities
Repurchases of common stock	(83)	(73)
Repayments of long-term borrowings	(6)	(6)
Payments of finance leases	(15)	(9)
Other financing activities, net	13	0
Net cash used in financing activities	(91)	(88)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(5)	(10)
Increase (decrease) in cash, cash equivalents and restricted cash	9	(100)
Cash, cash equivalents and restricted cash at beginning of period	533	496
Cash, cash equivalents and restricted cash at end of period	542	396
Supplemental cash flow disclosure:
Assets acquired under operating lease	2	3
Assets acquired under finance lease	45	15
Annual variable incentive payout settled in equity	17	0
Total cash, cash equivalents and restricted cash	$ 542	$ 396