Equity In Net Assets Of Nonconsolidated Affiliates Transactions with NCAs (Details) (Nonconsolidated Affiliates [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Nonconsolidated Affiliates [Member]
Results of operations [Abstract]
Automotive sales and revenue	$ 599	$ 568	$ 1,900	$ 1,873
Automotive purchases, net	239	98	614	407
Interest income and other non-operating income, net	9	11	16	174
Financial position [Abstract]
Accounts and notes receivable, net	520		520		1,668
Accounts payable	278		278		167
Deferred revenue and customer deposits	38		38		46
Cash flows [Abstract]
Operating			3,015	3,030
Investing			$ (12)	$ (38)