Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 21.1	$ 21.9	$ 19.3
Impact of foreign currency exchange rate changes	(0.2)	(2.6)	0.1
Provision	4.4	4.9	8.3
Write-offs	8.1	(3.1)	(5.8)
Ending balance	17.2	21.1	21.9
Valuation Allowance of Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	36.1	21.1	11.7
Provision	6.0	10.1	7.8
Changes attributable to acquisitions and dispositions	0	0	0.2
Changes impacting equity and other movements	(3.7)	5.1	1.8
Write-offs	1.3	(0.2)	(0.4)
Ending balance	$ 37.1	$ 36.1	$ 21.1