Balance Sheet Related Information (Details) (Allowance for Doubtful Accounts [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for Doubtful Accounts [Member]
Allowance for doubtful accounts
Balance at the beginning of the year	$ 7.5	$ 6.6	$ 6.3
Charged to expense (income)	5.3	3.6	2.4
Write-offs and currency translation adjustments	(1.8)	(2.7)	(2.1)
Balance at the end of the year	$ 11.0	$ 7.5	$ 6.6