Accounts Receivable (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accounts Receivable, Net, Current [Abstract]
Trade	$ 506.0	$ 493.6
Other	53.4	38.7
Total accounts receivable	559.4	532.3
Less-Allowance for doubtful accounts	(8.9)	(7.2)	(7.1)
Accounts receivable, net	550.5	525.1
Allowance for doubtful accounts [RollForward]
Beginning of year	7.2	7.1	6.8
Provision for uncollectible accounts receivable for Continuing operations	4.0	0.5	1.2
Write offs less recoveries	(1.4)	(0.9)	(1.2)
Foreign Currency Exchange Rate Translation	(0.9)	0.5	0.3
End of year	$ 8.9	$ 7.2	$ 7.1