|
Debt (Debt) (Details) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2014
|
Dec. 31, 2013
|
|---|---|---|
| Debt Instrument [Line Items] | ||
| Long-term Debt | $ 11,475 | $ 11,112 |
| Debt, Current | 189 | 204 |
| Long-term Debt, Excluding Current Maturities | 11,286 | 10,908 |
|
Corporate Debt Securities [Member]
|
||
| Debt Instrument [Line Items] | ||
| Long-term Debt | 4,989 | 4,989 |
|
Loans Payable [Member]
|
||
| Debt Instrument [Line Items] | ||
| Long-term Debt | 2,821 | 2,828 |
|
Notes Payable, Other Payables [Member]
|
||
| Debt Instrument [Line Items] | ||
| Long-term Debt | 1,865 | 1,901 |
|
Secured Debt [Member]
|
||
| Debt Instrument [Line Items] | ||
| Long-term Debt | 1,607 | 1,191 |
|
Capital Lease Obligations [Member]
|
||
| Debt Instrument [Line Items] | ||
| Long-term Debt | $ 193 | $ 203 |