|
Debt (Debt) (Details) (USD $)
In Millions, unless otherwise specified |
Sep. 30, 2012
|
Dec. 31, 2011
|
|---|---|---|
| Debt Instrument [Line Items] | ||
| Long-term Debt | $ 10,672 | $ 10,425 |
| Debt, Current | 105 | 104 |
| Long-term Debt, Excluding Current Maturities | (10,567) | (10,321) |
|
Corporate Debt Securities [Member]
|
||
| Debt Instrument [Line Items] | ||
| Long-term Debt | 5,892 | 5,892 |
|
Notes Payable, Other Payables [Member]
|
||
| Debt Instrument [Line Items] | ||
| Long-term Debt | 1,949 | 1,691 |
|
Loans Payable [Member]
|
||
| Debt Instrument [Line Items] | ||
| Long-term Debt | 1,634 | 1,646 |
|
Secured Debt [Member]
|
||
| Debt Instrument [Line Items] | ||
| Long-term Debt | 976 | 972 |
|
Capital Lease Obligations [Member]
|
||
| Debt Instrument [Line Items] | ||
| Long-term Debt | $ 221 | $ 224 |