Fair Value Measurements (Non-Recurring) (Details) (USD $) In Millions	3 Months Ended		6 Months Ended																						3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 Fair Value, Inputs, Level 2 [Member] Financing receivables and loans held for sale [Member]	Dec. 31, 2010 Fair Value, Inputs, Level 2 [Member] Financing receivables and loans held for sale [Member]	Jun. 30, 2011 Fair Value, Inputs, Level 2 [Member] Cost and equity method investments [Member]	Dec. 31, 2010 Fair Value, Inputs, Level 2 [Member] Cost and equity method investments [Member]	Jun. 30, 2011 Fair Value, Inputs, Level 2 [Member] Long Lived Assets, Including Real Estate [Member]	Dec. 31, 2010 Fair Value, Inputs, Level 2 [Member] Long Lived Assets, Including Real Estate [Member]	Jun. 30, 2011 Fair Value, Inputs, Level 2 [Member] Retained investments in formerly consolidated subsidiaries [Member]	Dec. 31, 2010 Fair Value, Inputs, Level 2 [Member] Retained investments in formerly consolidated subsidiaries [Member]	Jun. 30, 2011 Fair Value, Inputs, Level 2 [Member] Total [Member]	Dec. 31, 2010 Fair Value, Inputs, Level 2 [Member] Total [Member]	Jun. 30, 2011 Fair Value, Inputs, Level 3 [Member] Financing receivables and loans held for sale [Member]	Dec. 31, 2010 Fair Value, Inputs, Level 3 [Member] Financing receivables and loans held for sale [Member]	Jun. 30, 2011 Fair Value, Inputs, Level 3 [Member] Cost and equity method investments [Member]	Dec. 31, 2010 Fair Value, Inputs, Level 3 [Member] Cost and equity method investments [Member]	Jun. 30, 2011 Fair Value, Inputs, Level 3 [Member] Long Lived Assets, Including Real Estate [Member]	Dec. 31, 2010 Fair Value, Inputs, Level 3 [Member] Long Lived Assets, Including Real Estate [Member]	Jun. 30, 2011 Fair Value, Inputs, Level 3 [Member] Retained investments in formerly consolidated subsidiaries [Member]	Dec. 31, 2010 Fair Value, Inputs, Level 3 [Member] Retained investments in formerly consolidated subsidiaries [Member]	Jun. 30, 2011 Fair Value, Inputs, Level 3 [Member] Total [Member]	Dec. 31, 2010 Fair Value, Inputs, Level 3 [Member] Total [Member]	Jun. 30, 2011 Financing receivables and loans held for sale [Member]	Jun. 30, 2010 Financing receivables and loans held for sale [Member]	Jun. 30, 2011 Financing receivables and loans held for sale [Member]	Jun. 30, 2010 Financing receivables and loans held for sale [Member]	Jun. 30, 2011 Cost and equity method investments [Member]	Jun. 30, 2010 Cost and equity method investments [Member]	Jun. 30, 2011 Cost and equity method investments [Member]	Jun. 30, 2010 Cost and equity method investments [Member]	Jun. 30, 2011 Long Lived Assets, Including Real Estate [Member]	Jun. 30, 2010 Long Lived Assets, Including Real Estate [Member]	Jun. 30, 2011 Long Lived Assets, Including Real Estate [Member]	Jun. 30, 2010 Long Lived Assets, Including Real Estate [Member]	Jun. 30, 2011 Retained investments in formerly consolidated subsidiaries [Member]	Jun. 30, 2010 Retained investments in formerly consolidated subsidiaries [Member]	Jun. 30, 2011 Retained investments in formerly consolidated subsidiaries [Member]	Jun. 30, 2010 Retained investments in formerly consolidated subsidiaries [Member]	Jun. 30, 2011 Total [Member]	Jun. 30, 2010 Total [Member]	Jun. 30, 2011 Total [Member]	Jun. 30, 2010 Total [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value assets measured on non recurring basis					$ 20	$ 54	$ 0	$ 0	$ 644	$ 1,025	$ 0	$ 0	$ 664	$ 1,079	$ 5,955	$ 6,833	$ 361	$ 510	$ 2,810	$ 5,811	$ 0	$ 113	$ 9,126	$ 13,267
Adjustments To Assets Measured At Fair Value On Non Recurring Basis	$ 8	$ 13	$ 13	$ 26																					$ (281)	$ (684)	$ (603)	$ (1,208)	$ (127)	$ (40)	$ (176)	$ (94)	$ (346)	$ (738)	$ (867)	$ (1,339)	$ 0	$ 183	$ 0	$ 183	$ (754)	$ (1,279)	$ (1,646)	$ (2,458)