CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Cash Flows [Abstract]
Document Fiscal Year Focus	2018
Operating activities
Net loss	$ (87)	$ (107)
Adjustments to reconcile net loss to net cash provided by operating activities:
Vehicle depreciation	460	437
(Gain) loss on sale of vehicles, net	(1)	24
Non-vehicle related depreciation and amortization	61	63
Stock-based compensation	5	1
Amortization of debt financing fees	8	9
Early extinguishment of debt	5	3
Net change in assets and liabilities:
Receivables	16	30
Income taxes and deferred income taxes	(44)	(70)
Accounts payable and other current liabilities	109	63
Other, net	(29)	(6)
Net cash provided by operating activities	503	447
Investing activities
Property and equipment additions	(57)	(42)
Proceeds received on asset sales	4	2
Net assets acquired (net of cash acquired)	(10)	0
Other, net	(19)	0
Net cash used in investing activities exclusive of vehicle programs	(82)	(40)
Vehicle programs:
Investment in vehicles	(4,226)	(3,944)
Proceeds received on disposition of vehicles	2,572	2,958
Repayments of Related Party Debt	0	(33)
Net cash used in investing activities of vehicle programs	1,654	1,019
Net cash used in investing activities	(1,736)	(1,059)
Financing activities
Proceeds from long-term borrowings	81	590
Payments on long-term borrowings	(89)	(143)
Proceeds from (Repayments of) Short-term Debt	(1)	0
Repurchases of common stock	(14)	(61)
Debt financing fees	(8)	(7)
Other, net	1	0
Net cash (used in) provided by financing activities exclusive of vehicle programs	(30)	379
Vehicle programs:
Proceeds from borrowings	5,100	5,812
Payments on borrowings	(4,045)	(5,236)
Debt financing fees	(1)	(5)
Net cash provided by financing activities of vehicle programs	1,054	571
Net cash provided by financing activities	1,024	950
Effect of changes in exchange rates on cash and cash equivalents, program and restricted cash	9	12
Net (decrease) increase in cash and cash equivalents, program and restricted cash	(200)	350
Cash and cash equivalents, program and restricted cash, end of period	544	923
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 701	$ 1,070