|
Fair Value Measurements (Non-Recurring) (Details) (USD $)
In Millions, unless otherwise specified |
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, 2012
|
Jun. 30, 2012
Financing receivables and loans held for sale [Member]
|
Mar. 31, 2012
Financing receivables and loans held for sale [Member]
|
Jun. 30, 2011
Financing receivables and loans held for sale [Member]
|
Jun. 30, 2011
Financing receivables and loans held for sale [Member]
|
Jun. 30, 2012
Cost and equity method investments [Member]
|
Mar. 31, 2012
Cost and equity method investments [Member]
|
Jun. 30, 2011
Cost and equity method investments [Member]
|
Jun. 30, 2011
Cost and equity method investments [Member]
|
Jun. 30, 2012
Long Lived Assets, Including Real Estate [Member]
|
Mar. 31, 2012
Long Lived Assets, Including Real Estate [Member]
|
Jun. 30, 2011
Long Lived Assets, Including Real Estate [Member]
|
Jun. 30, 2011
Long Lived Assets, Including Real Estate [Member]
|
Jun. 30, 2012
Total [Member]
|
Mar. 31, 2012
Total [Member]
|
Jun. 30, 2011
Total [Member]
|
Jun. 30, 2011
Total [Member]
|
Jun. 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]
|
Jun. 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]
|
Jun. 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]
|
Jun. 30, 2012
Fair Value, Inputs, Level 2 [Member]
Total [Member]
|
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Total [Member]
|
Jun. 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]
|
Jun. 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]
|
Jun. 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]
|
Jun. 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 | $ 2,110 | $ 171 | $ 158 | $ 0 | $ 0 | $ 326 | $ 1,343 | $ 497 | $ 1,501 | $ 2,731 | $ 5,159 | $ 266 | $ 402 | $ 2,014 | $ 3,254 | $ 5,011 | $ 8,815 | ||||||||||||||||
| Adjustments To Assets Measured At Fair Value On Non Recurring Basis | $ (211) | $ (105) | $ (263) | $ (570) | $ (58) | $ (38) | $ (127) | $ (174) | $ (247) | $ (107) | $ (342) | $ (861) | $ (516) | $ (250) | $ (732) | $ (1,605) | |||||||||||||||||