|
Long-Term Debt (Parenthetical) (Detail)
|
12 Months Ended |
|---|---|
|
Dec. 31, 2011
|
|
|
1.25% Notes due on May 19, 2014
|
|
| Debt Instrument [Line Items] | |
| Long-term debt, interest rate | 1.25% |
| Long-term debt, maturity date | May 19, 2014 |
|
2.125% Notes due on May 19, 2016
|
|
| Debt Instrument [Line Items] | |
| Long-term debt, interest rate | 2.125% |
| Long-term debt, maturity date | May 19, 2016 |
|
3.625% Notes due on May 19, 2021
|
|
| Debt Instrument [Line Items] | |
| Long-term debt, interest rate | 3.625% |
| Long-term debt, maturity date | May 19, 2021 |