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Fair Value Measurements (Additional Information) (Detail) (USD $) In Millions, unless otherwise specified | Sep. 30, 2014 | Sep. 30, 2014 2.58% Senior Euro Notes, due June 2015 | Sep. 30, 2014 4.5% Senior Notes, due December 2020 | Dec. 06, 2010 4.5% Senior Notes, due December 2020 | Sep. 30, 2014 4.2% Senior Notes, due December 2021 | Dec. 09, 2011 4.2% Senior Notes, due December 2021
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |
Stated interest rate |  | 2.58% | 4.50% | 4.50% | 4.20% | 4.20%
Fair value of our revolving facility and senior debt | $ 851.1 |  |  |  |  |
Carrying value of our revolving facility and senior debt | $ 821.0 |  |  |  |  |

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