Income Taxes Level 4 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Tax Contingency [Line Items]
Effective Income Tax Rate, Continuing Operations	34.60%	20.50%	35.80%	33.50%
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority	$ 6.6		$ 6.6
Increase (Decrease) in Income Taxes			3.1
Unrecognized Tax Benefits	146.9		146.9
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	40.8		40.8
Unrecognized Tax Benefits, Period Increase (Decrease)			9.4
Unrecognized tax benefits, reduction of accrued interest			$ 1.0