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Income Taxes - Summary of Difference Between Provision (Benefit) for Income Taxes Calculated at United States Federal Statutory Income Tax Rate and Consolidated Provision (Benefit) for Income Taxes (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Tax Disclosure [Abstract]      
Consolidated income before provision (benefit) for income taxes and equity in net income of affiliates multiplied by the United States federal statutory income tax rate $ 275.6us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate $ 213.5us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate $ 227.1us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Differences in income taxes on foreign earnings, losses and remittances (47.8)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential (38.7)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential 1.8us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential
Valuation allowance adjustments (74.2)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance 0.2us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance (764.5)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Tax credits (0.7)us-gaap_IncomeTaxReconciliationTaxCredits (16.4)us-gaap_IncomeTaxReconciliationTaxCredits (43.5)us-gaap_IncomeTaxReconciliationTaxCredits
Effective Income Tax Rate Reconciliation, Tax Settlement, Amount (12.8)us-gaap_IncomeTaxReconciliationTaxSettlements 2.7us-gaap_IncomeTaxReconciliationTaxSettlements (48.7)us-gaap_IncomeTaxReconciliationTaxSettlements
Other (18.7)us-gaap_IncomeTaxReconciliationOtherAdjustments 31.4us-gaap_IncomeTaxReconciliationOtherAdjustments (10.2)us-gaap_IncomeTaxReconciliationOtherAdjustments
Provision (benefit) for income taxes $ 121.4us-gaap_IncomeTaxExpenseBenefit $ 192.7us-gaap_IncomeTaxExpenseBenefit $ (638.0)us-gaap_IncomeTaxExpenseBenefit