Supplemental Guarantor And Parent Company Condensed Financial Information (Intercompany Cash And Non-Cash Transactions) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Statement Cash and Non-Cash Transactions [Line Items]
Beginning Balance	$ 0
Cash transactions	0	0	0
Ending Balance	0	0
Parent Company [Member]
Statement Cash and Non-Cash Transactions [Line Items]
Beginning Balance	1,169.7	1,091.5	1,037.3
Convertible notes and other debt	0	0	8.9
Deferred tax	8.0	30.5	0
Equity based awards	12.7	9.0	10.9
Foreign currency and other	(1.0)	0.7	19.3
Cash transactions	21.0	38.0	15.1
Ending Balance	$ 1,210.4	$ 1,169.7	$ 1,091.5