Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Components Of Income Tax Expense Benefit Continuing Operations Abstract
Current Federal Tax Expense Benefit	$ 44.8	$ (47.3)	$ (91.3)
Current State And Local Tax Expense Benefit	8.1	(4.4)	(2.8)
Current Foreign Tax Expense Benefit	13.3	8.9	(1.8)
Current Income Tax Expense (Benefit), Total	66.2	(42.8)	(95.9)
Deferred Federal Income Tax Expense Benefit	48.4	83.4	115.5
Deferred State And Local Income Tax Expense Benefit	2.4	6.0	3.8
Deferred Foreign Income Tax Expense Benefit	(0.7)	0.4	3.5
Deferred Income Tax Expense (Benefit), Total	50.1	89.8	122.8
Income tax provision (benefit), Total	$ 116.3	$ 47.0	$ 26.9