Derivative Financial Instruments (Cash Flow Hedge Derivative Gains and Losses Recognized in AOCI and Reclassified to Earnings) (Details) - Asset And Liability Management - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Foreign Exchange Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Net Gain/(Loss) Recognized in AOCI	$ 1.8	$ (6.9)	$ 0.4	$ (5.8)
Net Gain/(Loss) Reclassified from AOCI to Net Income	(1.5)	0.7	(6.2)	3.2
Interest Rate Option Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Net Gain/(Loss) Recognized in AOCI	4.6	(0.7)	6.1	(0.7)
Net Gain/(Loss) Reclassified from AOCI to Net Income	1.4	0.1	3.8	0.1
Net Gain/(Loss) Reclassified from AOCI to Net Income | Foreign Exchange Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Other Operating Income	(1.0)	0.7	(4.9)	3.4
Interest Income	0.0	0.0	0.0	0.0
Other Operating Expense	0.5	0.0	1.3	0.2
Net Gain/(Loss) Reclassified from AOCI to Net Income | Interest Rate Option Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Other Operating Income	0.0	0.0	0.0	0.0
Interest Income	1.4	0.1	3.8	0.1
Other Operating Expense	$ 0.0	$ 0.0	$ 0.0	$ 0.0