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Commitments, Guarantees, Indemnifications, and Legal Proceedings - Schedule of Purchase Commitments (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]  
2015 $ 86.8us-gaap_UnrecordedUnconditionalPurchaseObligationDueInNextRollingTwelveMonths
2016 21.4us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary
2017 8.6us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary
2018 8.0us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary
2019 8.0us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary
Thereafter 9.4us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears
Total $ 142.2us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount