Annual report pursuant to Section 13 and 15(d)

Basis of Presentation - Components of Accumulated Other Comprehensive Income (Loss) (Detail)

v2.4.1.9
Basis of Presentation - Components of Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Foreign currency translation adjustment, net of tax $ (96.4)us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax $ (25.6)us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax $ (28.8)us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax
Unrealized gain/(loss) on derivatives, net of tax 18.0us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax 5.7us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax (2.9)us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax
Unrealized gain on available-for-sale investments, net of tax 0.2us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax 0.1us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax  
Total accumulated other comprehensive income (loss) $ (78.2)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ (19.8)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ (31.7)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax