Fair Value Measurements (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Fair value assets	$ 12.2	$ 13.0
Equity Funds [Member]
Fair value assets	9.7	10.3
Common Stock [Member]
Fair value assets	1.8	2.1
Money Market Funds [Member]
Fair value assets	0.7	0.6
Estimate Of Fair Value, Fair Value Disclosure [Member]
Foreign currency forward contracts (asset position)	2.1	3.3
Foreign currency forward contracts (liability position)	44.4	32.7
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Foreign currency forward contracts (asset position)	0.0	0.0
Foreign currency forward contracts (liability position)	0.0	0.0
Fair value assets	12.2	13.0
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Equity Funds [Member]
Fair value assets	9.7	10.3
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Common Stock [Member]
Fair value assets	1.8	2.1
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Money Market Funds [Member]
Fair value assets	0.7	0.6
Significant Other Observable Inputs (Level 2) [Member]
Foreign currency forward contracts (asset position)	2.1	3.3
Foreign currency forward contracts (liability position)	44.4	32.7
Fair value assets	0.0	0.0
Significant Other Observable Inputs (Level 2) [Member] | Equity Funds [Member]
Fair value assets	0.0	0.0
Significant Other Observable Inputs (Level 2) [Member] | Common Stock [Member]
Fair value assets	0.0	0.0
Significant Other Observable Inputs (Level 2) [Member] | Money Market Funds [Member]
Fair value assets	0.0	0.0
Significant Unobservable Inputs (Level 3) [Member]
Foreign currency forward contracts (asset position)	0.0	0.0
Foreign currency forward contracts (liability position)	0.0	0.0
Fair value assets	0.0	0.0
Significant Unobservable Inputs (Level 3) [Member] | Equity Funds [Member]
Fair value assets	0.0	0.0
Significant Unobservable Inputs (Level 3) [Member] | Common Stock [Member]
Fair value assets	0.0	0.0
Significant Unobservable Inputs (Level 3) [Member] | Money Market Funds [Member]
Fair value assets	$ 0.0	$ 0.0