Guarantor and Non-Guarantor Condensed Consolidating Financial Statements (Operations and Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Total revenues	$ 2,454	$ 2,536
Expenses:
Direct operating	1,408	1,443
Depreciation of revenue earning equipment and lease charges, net	707	726
Selling, general and administrative	266	276
Interest expense, net	154	153
Other (income) expense, net	5	(3)
Total expenses	2,540	2,595
Income (loss) before income taxes	(86)	(59)
Provision for taxes on income	16	(8)
Equity in earnings (losses) of subsidiaries (net of tax)	0	0
Net income (loss)	(70)	(67)
Other comprehensive income (loss), net of tax	(46)	(19)
Comprehensive income (loss)	(116)	(86)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Total revenues	(596)	(769)
Expenses:
Direct operating	(1)	(1)
Depreciation of revenue earning equipment and lease charges, net	$ (595)	(768)
Selling, general and administrative		0
Interest expense, net	$ 0	0
Other (income) expense, net	0	0
Total expenses	(596)	(769)
Income (loss) before income taxes	0	0
Provision for taxes on income	0	0
Equity in earnings (losses) of subsidiaries (net of tax)	(247)	(226)
Net income (loss)	(247)	(226)
Other comprehensive income (loss), net of tax	50	19
Comprehensive income (loss)	(197)	(207)
Parent
Condensed Financial Statements, Captions [Line Items]
Total revenues	1,115	1,122
Expenses:
Direct operating	694	682
Depreciation of revenue earning equipment and lease charges, net	455	663
Selling, general and administrative	114	135
Interest expense, net	91	83
Other (income) expense, net	0	(7)
Total expenses	1,354	1,556
Income (loss) before income taxes	(239)	(434)
Provision for taxes on income	(32)	160
Equity in earnings (losses) of subsidiaries (net of tax)	201	207
Net income (loss)	(70)	(67)
Other comprehensive income (loss), net of tax	(46)	(19)
Comprehensive income (loss)	(116)	(86)
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Total revenues	657	656
Expenses:
Direct operating	378	358
Depreciation of revenue earning equipment and lease charges, net	184	169
Selling, general and administrative	62	49
Interest expense, net	5	6
Other (income) expense, net	0	0
Total expenses	629	582
Income (loss) before income taxes	28	74
Provision for taxes on income	2	(28)
Equity in earnings (losses) of subsidiaries (net of tax)	46	19
Net income (loss)	76	65
Other comprehensive income (loss), net of tax	(4)	(2)
Comprehensive income (loss)	72	63
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Total revenues	1,278	1,527
Expenses:
Direct operating	337	404
Depreciation of revenue earning equipment and lease charges, net	663	662
Selling, general and administrative	90	92
Interest expense, net	58	64
Other (income) expense, net	5	4
Total expenses	1,153	1,226
Income (loss) before income taxes	125	301
Provision for taxes on income	46	(140)
Equity in earnings (losses) of subsidiaries (net of tax)	0	0
Net income (loss)	171	161
Other comprehensive income (loss), net of tax	(46)	(17)
Comprehensive income (loss)	$ 125	$ 144