Revenues (Details) - USD ($)
$ in Millions

3 Months Ended

9 Months Ended

Sep. 30, 2018

Sep. 30, 2017

Sep. 30, 2018

Sep. 30, 2017

Revenues [Abstract]

Deferred Revenue Rollforward [Table Text Block]

The following table presents changes in the Company’s contract liabilities during the nine months ended September 30, 2018.

	Balance at January 1, 2018		Revenue deferred		Revenue recognized		Balance at September 30, 2018
Prepaid rentals(a)	$	101	$	1,406	$	1,384	$	123
Other deferred revenue(b)	93		167		167		93
Total deferred revenue	$	194	$	1,573	$	1,551	$	216

________

^(a)  At September 30, 2018, included in accounts payable and other current liabilities.

^(b)  At September 30, 2018, $38 million included in accounts payable and other current liabilities and $55 million in other non-current liabilities. Non-current amounts are expected to be recognized as revenue within two to three years.

Disaggregation of Revenue by Geography [Table Text Block]

The following table presents the Company’s revenues disaggregated by geography.

	Three Months Ended September 30, 2018		Nine Months Ended September 30, 2018
Americas	$	1,844	$	4,782
Europe, Middle East and Africa	784		1,830
Asia and Australasia	150		462
Total revenues	$	2,778	$	7,074

Disaggregation of Revenue by Brand [Table Text Block]

The following table presents the Company’s revenues disaggregated by brand.

	Three Months Ended September 30, 2018		Nine Months Ended September 30, 2018
Avis	$	1,599	$	4,095
Budget	953		2,372
Other	226		607
Total revenues	$	2,778	$	7,074

________

Other includes Zipcar, Payless, Apex, Maggiore and FranceCars.

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

$ 2,778

$ 2,752

$ 7,074

$ 6,829

Budget

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

953

2,372

Avis

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

1,599

4,095

Other

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

226

607

Americas

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

1,844

$ 1,839

4,782

$ 4,718

Europe, Middle East and Africa

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

784

1,830

Asia and Australasia

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

$ 150

$ 462