Derivative Financial Instruments (Fair Value Of Derivative Instruments In Statement Of Financial Position) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value
Derivative assets	$ 160.9	$ 238.0
Derivative liabilities	207.5	410.7
Derivatives Designated As Hedging Instruments | Foreign Exchange Contract
Derivatives, Fair Value
Derivative assets	92.8	57.9
Derivative liabilities	123.2	230.6
Derivatives Designated As Hedging Instruments | Foreign Exchange Contract | Current - Derivative Financial Instruments
Derivatives, Fair Value
Derivative assets	74.0	47.2
Derivative liabilities	113.0	183.0
Derivatives Designated As Hedging Instruments | Foreign Exchange Contract | Long-Term - Derivative Financial Instruments
Derivatives, Fair Value
Derivative assets	18.8	10.7
Derivative liabilities	10.2	47.6
Derivatives Not Designated As Hedging Instruments | Foreign Exchange Contract
Derivatives, Fair Value
Derivative assets	7.2
Derivative liabilities	23.4
Derivatives Not Designated As Hedging Instruments | Foreign Exchange Contract | Current - Derivative Financial Instruments
Derivatives, Fair Value
Derivative assets	6.8
Derivative liabilities	18.9
Derivatives Not Designated As Hedging Instruments | Foreign Exchange Contract | Long-Term - Derivative Financial Instruments
Derivatives, Fair Value
Derivative assets	0.4
Derivative liabilities	4.5
Derivatives Not Designated As Hedging Instruments | Long-term – Derivative financial instruments – Synthetic Bonds – Call Option Premium
Derivatives, Fair Value
Derivative assets	60.9	180.1
Derivatives Not Designated As Hedging Instruments | Long-term – Derivative financial instruments – Synthetic Bonds – Embedded Derivatives
Derivatives, Fair Value
Derivative liabilities	$ 60.9	$ 180.1