Fair Value Measurement (Details) (Fair value measured on recurring basis, USD $) In Millions, unless otherwise specified	Mar. 31, 2013
Level 1
Assets:
Foreign currency exchange derivatives	$ 0	[1]
Liabilities:
Foreign currency exchange derivatives	0	[1]
Level 2
Assets:
Foreign currency exchange derivatives	1.5	[1]
Liabilities:
Foreign currency exchange derivatives	0.4	[1]
Level 3
Assets:
Foreign currency exchange derivatives	0	[1]
Liabilities:
Foreign currency exchange derivatives	0	[1]
Total
Assets:
Foreign currency exchange derivatives	1.5	[1]
Liabilities:
Foreign currency exchange derivatives	$ 0.4	[1]

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