Derivative Instruments (Location and Amounts of Derivative Fair Values On The Condensed Consolidated Balance Sheets) (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Asset Derivative Notional Amount	$ 226.8	$ 328.2
Asset Derivative Fair Value	6.5	17.8
Liability Derivative Notional Amount	277.9	114.1
Liability Derivative Fair Value	3.9	4.1
Foreign exchange contracts | Other assets
Derivatives, Fair Value [Line Items]
Asset Derivative Notional Amount	1.8	103.2
Asset Derivative Fair Value	0.0	10.4
Foreign exchange contracts | Accounts payable and accrued liabilities
Derivatives, Fair Value [Line Items]
Liability Derivative Notional Amount	57.9	4.1
Liability Derivative Fair Value	0.3	0.1
Interest rate swaps | Other assets
Derivatives, Fair Value [Line Items]
Asset Derivative Notional Amount	0.0	0.0
Asset Derivative Fair Value	0.0	0.0
Interest rate swaps | Accounts payable and accrued liabilities
Derivatives, Fair Value [Line Items]
Liability Derivative Notional Amount	100.0	0.0
Liability Derivative Fair Value	0.2	0.0
Insurance contracts | Other assets
Derivatives, Fair Value [Line Items]
Asset Derivative Notional Amount	225.0	225.0
Asset Derivative Fair Value	6.5	7.4
Insurance contracts | Accounts payable and accrued liabilities
Derivatives, Fair Value [Line Items]
Liability Derivative Notional Amount	0.0	0.0
Liability Derivative Fair Value	0.0	0.0
Reinsurance contracts | Other assets
Derivatives, Fair Value [Line Items]
Asset Derivative Notional Amount	0.0	0.0
Asset Derivative Fair Value	0.0	0.0
Reinsurance contracts | Accounts payable and accrued liabilities
Derivatives, Fair Value [Line Items]
Liability Derivative Notional Amount	120.0	110.0
Liability Derivative Fair Value	$ 3.4	$ 4.0