Fair Value Measurement (Details) (Fair value measured on recurring basis, USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Level 1
Fair value of financial assets and liabilities
Defined Benefit Plan, Fair Value of Plan Assets	$ 21.6
Assets:
Foreign currency exchange derivatives	0	[1]
Liabilities:
Foreign currency exchange derivatives	0
Level 2
Fair value of financial assets and liabilities
Defined Benefit Plan, Fair Value of Plan Assets	0
Assets:
Foreign currency exchange derivatives	0.4	[1]
Liabilities:
Foreign currency exchange derivatives	0.4
Level 3
Fair value of financial assets and liabilities
Defined Benefit Plan, Fair Value of Plan Assets	0
Assets:
Foreign currency exchange derivatives	0	[1]
Liabilities:
Foreign currency exchange derivatives	0
Total
Fair value of financial assets and liabilities
Defined Benefit Plan, Fair Value of Plan Assets	21.6
Assets:
Foreign currency exchange derivatives	0.4	[1]
Liabilities:
Foreign currency exchange derivatives	$ 0.4	[1]

[1] Based on observable market transactions of forward currency prices.