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Schedule of Borrowings (Schedule of Debt, Narrative) (Detail) | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 09, 2011 | Dec. 06, 2010
4.2% Senior Notes, due December 2021 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated interest rate |  |  | 4.20% |  | 4.20% | 4.20% |
Senior Notes, maturity date | Dec. 15, 2021 |  | Dec. 31, 2021 | Dec. 31, 2021 |  |  |
4.5% Senior Notes, due December 2020 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated interest rate |  |  | 4.50% |  |  |  | 4.50%
Senior Notes, maturity date |  | Dec. 15, 2020 | Dec. 31, 2020 | Dec. 31, 2020 |  |  |
2.58% Senior Euro Notes, due June 2015 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stated interest rate |  |  | 2.58% |  |  |  |
Senior Notes, maturity date |  |  | Jun. 30, 2015 | Jun. 30, 2015 |  |  |

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