Equity In Net Assets Of Nonconsolidated Affiliates Transactions with NCAs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Income Statement [Abstract]
Interest Income and Other Non-operating Income, Net	$ 139	$ 308	$ 414	$ 912
Statement of Cash Flows [Abstract]
Operating Cash Flow			6,441	4,687
Investing Cash Flow			(825)	(5,187)
Nonconsolidated Affiliates [Member]
Income Statement [Abstract]
Automotive Sales and Revenue	722	852	1,305	1,687
Automotive Purchases, Net	174	38	309	830
Automotive Selling, General and Administrative Expense	1	(2)	3	6
Automotive Interest Expense	6	5	12	10
Interest Income and Other Non-operating Income, Net	148	13	163	11
Statement of Financial Position [Abstract]
Accounts and notes receivable, net	915		915		1,785
Accounts and notes payable	359		359		342
Deferred Revenue and Customer Deposits	44		44		150
Statement of Cash Flows [Abstract]
Operating Cash Flow			2,391	1,904
Investing Cash Flow			$ (37)	$ 1