Derivatives and Hedging Activities Non-designated Hedges Text description (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014 Not Designated as Hedging Instrument [Member]	Mar. 31, 2013 Not Designated as Hedging Instrument [Member]	Mar. 31, 2014 Interest Rate Swap [Member] Not Designated as Hedging Instrument [Member] contracts	Dec. 31, 2013 Interest Rate Swap [Member] Not Designated as Hedging Instrument [Member] contracts	Mar. 31, 2014 Interest Rate Swap [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2013 Interest Rate Swap [Member] Designated as Hedging Instrument [Member]	Mar. 31, 2014 Foreign Exchange Contract [Member] Not Designated as Hedging Instrument [Member] contracts	Dec. 31, 2013 Foreign Exchange Contract [Member] Not Designated as Hedging Instrument [Member] contracts
Derivative [Line Items]
Derivative, Collateral, Obligation to Return Cash			$ 6.7	$ 6.1
Derivative, Collateral, Right to Reclaim Cash					5.1	7.3
Derivative Credit Risk Valuation Adjustment, Derivative Assets	0	0
Derivative, Number of Instruments Held			14	12			0	0
Derivative, Notional Amount			$ 169.9	$ 150.8