|
Long-Term Debt (Detail) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2011
|
Dec. 31, 2010
|
|---|---|---|
| Debt Instrument [Line Items] | ||
| Unamortized discount for the Notes above | $ (14) | |
| Total | 2,986 | 0 |
|
1.25% Notes due on May 19, 2014
|
||
| Debt Instrument [Line Items] | ||
| Long-term debt | 1,000 | |
|
2.125% Notes due on May 19, 2016
|
||
| Debt Instrument [Line Items] | ||
| Long-term debt | 1,000 | |
|
3.625% Notes due on May 19, 2021
|
||
| Debt Instrument [Line Items] | ||
| Long-term debt | $ 1,000 |