Consolidated Statements of Income (Parenthetical) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Statement [Abstract]
Income tax expense from discontinued operations	$ 0	$ 0	$ 0
Other Intangible Assets
Impairment charges	16.0	42.7	0
Favorable Manufacturing Contract
Other Intangible Assets
Amortization of intangible assets	1.7	1.7	1.7
Acquired Intellectual Property Rights
Other Intangible Assets
Impairment charges	0		0
Amortization and impairment charges of intangible assets	$ 165.0	$ 176.2	$ 136.9