Stockholders' Equity (Components Of Other Comprehensive Income) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax			$ (31)
Net loss	118	280	44	336
Currency translation adjustment	39	26	(21)	14
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	2	2	1	0
Net unrealized gains on cash flow hedges, net of tax	0	0	1	11
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	19	0	19	0
Accumulated Other Comprehensive Income, Current period change	60	28	0	25
Total comprehensive income	178	308	44	361
Company's Vehicle-Backed Debt And Floating Rate Debt [Member]
Net unrealized gain (losses) on cash flow hedges, before tax			1	11
Floating Rate Vehicle Backed And Corporate Debt [Member]
Net unrealized gain (losses) on cash flow hedges, before tax			$ 1	$ 20