Consolidated Statements of Cash Flows € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Operating activities
Net income	$ 440	$ 444	$ 360
Adjustments to reconcile net income to net cash from operating activities
Depreciation, amortization and net lease activity	739	716	658
Stock compensation expense	67	49	79
Accretion of debt	21	15	19
Deferred tax expense (benefit)	46	45	(158)
Debt extinguishment loss	5	27	36
Unrealized loss (gain) on foreign currency option and forward contracts	9	(20)	49
Gain on sale of equity investment	0	(24)	0
Gains on sales of property and equipment	(110)	(8)	(13)
Other	21	8	26
Changes in assets and liabilities:
Accounts receivable	(67)	(13)	(320)
Other assets	(47)	(49)	(92)
Accounts payable	(120)	35	140
Accrued expenses and other liabilities	(213)	(123)	1
Net cash provided by operating activities	791	1,102	785
Investing activities
Payment for purchases of property and equipment	(601)	(551)	(504)
Proceeds from sale of property and equipment	252	143	118
Cash collected on deferred purchase price receivable	186	0	0
Other	2	8	0
Net cash used in investing activities	(161)	(400)	(386)
Financing activities
Proceeds from issuance of debt	1,754	1,074	819
Repurchase of debt	0	(1,225)	(1,387)
Proceeds from borrowings on ABL facility	1,935	1,355	995
Repayment of borrowings on ABL facility	(1,935)	(1,455)	(925)
Repayment of debt and finance leases	(867)	(119)	(106)
Payment for debt issuance costs	(28)	(10)	(17)
Proceeds from forward sale settlement	0	349	0
Proceeds from common stock offerings	0	0	288
Purchase of noncontrolling interests	(258)	0	0
Repurchase of common stock	(1,347)	(536)	0
Payment for tax withholdings for restricted shares	(14)	(53)	(17)
Dividends paid	(8)	(8)	(7)
Other	9	8	(9)
Net cash used in financing activities	(759)	(620)	(366)
Effect of exchange rates on cash, cash equivalents and restricted cash	2	(17)	16
Net (decrease) increase in cash, cash equivalents and restricted cash	(127)	65	49
Cash, cash equivalents and restricted cash, beginning of year	514	449	400
Cash, cash equivalents and restricted cash, end of year	387	514	449
Supplemental disclosure of cash flow information:
Cash paid for interest	282	233	274
Cash paid for income taxes	$ 121	$ 70	$ 79