CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Statement of Cash Flows [Abstract]
Document Fiscal Year Focus	2018
Operating activities
Net income (loss)	$ (61)	$ (104)
Adjustments to reconcile net loss to net cash provided by operating activities:
Vehicle depreciation	996	953
(Gain) loss on sale of vehicles, net	(10)	51
Non-vehicle related depreciation and amortization	128	128
Stock-based compensation	12	7
Amortization of debt financing fees	13	17
Early extinguishment of debt	5	3
Net change in assets and liabilities:
Receivables	(68)	(36)
Income taxes and deferred income taxes	(49)	(91)
Accounts payable and other current liabilities	141	112
Other, net	14	99
Net cash provided by operating activities	1,121	1,139
Investing activities
Property and equipment additions	(115)	(86)
Proceeds received on asset sales	6	4
Net assets acquired (net of cash acquired)	(28)	(14)
Other, net	(37)	0
Net cash used in investing activities exclusive of vehicle programs	(174)	(96)
Vehicle programs:
Investment in vehicles	(8,359)	(8,116)
Proceeds received on disposition of vehicles	4,807	5,059
Repayments of Related Party Debt	(22)	(33)
Net cash used in investing activities of vehicle programs	3,574	3,090
Net cash used in investing activities	(3,748)	(3,186)
Financing activities
Proceeds from long-term borrowings	81	589
Payments on long-term borrowings	(94)	(591)
Proceeds from (Repayments of) Short-term Debt	(2)	(1)
Repurchases of common stock	(78)	(109)
Debt financing fees	(9)	(8)
Other, net	2	0
Net cash used in financing activities exclusive of vehicle programs	(100)	(120)
Vehicle programs:
Proceeds from borrowings	10,145	11,255
Payments on borrowings	(7,643)	(8,988)
Debt financing fees	(13)	(8)
Net cash provided by financing activities of vehicle programs	2,489	2,259
Net cash provided by financing activities	2,389	2,139
Effect of changes in exchange rates on cash and cash equivalents, program and restricted cash	(2)	36
Net (decrease) increase in cash and cash equivalents, program and restricted cash	(240)	128
Cash and cash equivalents, program and restricted cash, beginning of period	901	720
Cash and cash equivalents, program and restricted cash, end of period	$ 661	$ 848