Fair Value Measurements (Non-Recurring) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | |||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2012
|
Sep. 30, 2012
Financing receivables and loans held for sale [Member]
|
Sep. 30, 2011
Financing receivables and loans held for sale [Member]
|
Sep. 30, 2012
Financing receivables and loans held for sale [Member]
|
Sep. 30, 2011
Financing receivables and loans held for sale [Member]
|
Sep. 30, 2012
Cost and equity method investments [Member]
|
Sep. 30, 2011
Cost and equity method investments [Member]
|
Sep. 30, 2012
Cost and equity method investments [Member]
|
Sep. 30, 2011
Cost and equity method investments [Member]
|
Sep. 30, 2012
Long Lived Assets, Including Real Estate [Member]
|
Sep. 30, 2011
Long Lived Assets, Including Real Estate [Member]
|
Sep. 30, 2012
Long Lived Assets, Including Real Estate [Member]
|
Sep. 30, 2011
Long Lived Assets, Including Real Estate [Member]
|
Sep. 30, 2012
Total [Member]
|
Sep. 30, 2011
Total [Member]
|
Sep. 30, 2012
Total [Member]
|
Sep. 30, 2011
Total [Member]
|
Sep. 30, 2012
Fair Value, Inputs, Level 2 [Member]
Financing receivables and loans held for sale [Member]
|
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Financing receivables and loans held for sale [Member]
|
Sep. 30, 2012
Fair Value, Inputs, Level 2 [Member]
Cost and equity method investments [Member]
|
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Cost and equity method investments [Member]
|
Sep. 30, 2012
Fair Value, Inputs, Level 2 [Member]
Long Lived Assets, Including Real Estate [Member]
|
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Long Lived Assets, Including Real Estate [Member]
|
Sep. 30, 2012
Fair Value, Inputs, Level 2 [Member]
Total [Member]
|
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Total [Member]
|
Sep. 30, 2012
Fair Value, Inputs, Level 3 [Member]
Financing receivables and loans held for sale [Member]
|
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Financing receivables and loans held for sale [Member]
|
Sep. 30, 2012
Fair Value, Inputs, Level 3 [Member]
Cost and equity method investments [Member]
|
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Cost and equity method investments [Member]
|
Sep. 30, 2012
Fair Value, Inputs, Level 3 [Member]
Long Lived Assets, Including Real Estate [Member]
|
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Long Lived Assets, Including Real Estate [Member]
|
Sep. 30, 2012
Fair Value, Inputs, Level 3 [Member]
Total [Member]
|
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Total [Member]
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||||||||||||||||||||||||
Fair value assets measured on non recurring basis | $ 1,862 | $ 482 | $ 158 | $ 4 | $ 0 | $ 483 | $ 1,343 | $ 969 | $ 1,501 | $ 3,798 | $ 5,159 | $ 336 | $ 403 | $ 1,565 | $ 3,282 | $ 5,699 | $ 8,844 | ||||||||||||||||
Adjustments To Assets Measured At Fair Value On Non Recurring Basis | $ (225) | $ (254) | $ (411) | $ (716) | $ (50) | $ (84) | $ (105) | $ (257) | $ (451) | $ (368) | $ (651) | $ (1,265) | $ (726) | $ (706) | $ (1,167) | $ (2,238) |