Subsequent Events (Details) - USD ($) $ in Millions		1 Months Ended
	Oct. 30, 2015	Oct. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Subsequent Event [Line Items]
Nominal Unpaid Principal Balance			$ 3,900	$ 3,900
HVF II U.S. ABS Program
Subsequent Event [Line Items]
Nominal Unpaid Principal Balance			$ 4,485	$ 3,844
Subsequent Event
Subsequent Event [Line Items]
Dividends		$ 365
Subsequent Event | HERC | France and Spain | Discontinued Operations, Held-for-sale or Disposed of by Sale
Subsequent Event [Line Items]
Recognized gain on disposal	$ 45
Subsequent Event | HVF II U.S. ABS Program
Subsequent Event [Line Items]
Nominal Unpaid Principal Balance		636
Subsequent Event | HVF II Series 2015-2 Notes, Class A
Subsequent Event [Line Items]
Nominal Unpaid Principal Balance		$ 190
Average interest rate (as a percent)		2.02%
Subsequent Event | HVF II Series 2015-2 Notes, Class B
Subsequent Event [Line Items]
Nominal Unpaid Principal Balance		$ 46
Average interest rate (as a percent)		2.96%
Subsequent Event | HVF II Series 2015-2 Notes, Class
Subsequent Event [Line Items]
Nominal Unpaid Principal Balance		$ 14
Average interest rate (as a percent)		3.95%
Subsequent Event | HVF II Series 2015-2 Notes, Class D
Subsequent Event [Line Items]
Nominal Unpaid Principal Balance		$ 15
Average interest rate (as a percent)		4.93%
Subsequent Event | HVF II Series 2015-3 Notes, Class A
Subsequent Event [Line Items]
Nominal Unpaid Principal Balance		$ 265
Average interest rate (as a percent)		2.67%
Subsequent Event | HVF II Series 2015-3 Notes, Class B
Subsequent Event [Line Items]
Nominal Unpaid Principal Balance		$ 65
Average interest rate (as a percent)		3.71%
Subsequent Event | HVF II Series 2015-3 Notes, Class C
Subsequent Event [Line Items]
Nominal Unpaid Principal Balance		$ 20
Average interest rate (as a percent)		4.44%
Subsequent Event | HVF II Series 2015-3 Notes, Class D
Subsequent Event [Line Items]
Nominal Unpaid Principal Balance		$ 21
Average interest rate (as a percent)		5.33%
Subsequent Event | HVF II Series 2015-3 Notes, Class D | Consolidation eliminations | Affiliated Entity
Subsequent Event [Line Items]
Nominal Unpaid Principal Balance		$ 36