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

3 Months Ended

6 Months Ended

Jun. 30, 2018

Jun. 30, 2017

Jun. 30, 2018

Jun. 30, 2017

Revenues [Abstract]

Deferred Revenue Rollforward [Table Text Block]

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

	Balance at January 1, 2018		Revenue deferred		Revenue recognized		Balance at June 30, 2018
Prepaid rentals(a)	$	101	$	891	$	782	$	210
Other deferred revenue(b)	93		108		108		93
Total deferred revenue	$	194	$	999	$	890	$	303

________

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

^(b)  At June 30, 2018, $37 million included in accounts payable and other current liabilities and $56 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 June 30, 2018		Six Months Ended June 30, 2018
Americas	$	1,590	$	2,938
Europe, Middle East and Africa	600		1,047
Asia and Australasia	138		311
Total revenues	$	2,328	$	4,296

Disaggregation of Revenue by Brand [Table Text Block]

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

	Three Months Ended June 30, 2018		Six Months Ended June 30, 2018
Avis	$	1,351	$	2,496
Budget	777		1,419
Other	200		381
Total revenues	$	2,328	$	4,296

________

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

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

$ 2,328

$ 2,238

$ 4,296

$ 4,077

Budget

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

777

1,419

Avis

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

1,351

2,496

Other

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

200

381

Americas

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

1,590

$ 1,565

2,938

$ 2,879

Europe, Middle East and Africa

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

600

1,047

Asia and Australasia

Segment Reporting, Revenue Reconciling Item [Line Items]

Revenues

$ 138

$ 311