Income Taxes Level 4 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Tax Contingency [Line Items]
Effective Income Tax Rate, Continuing Operations	37.50%	32.40%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	0.00%
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority	$ 6.6
Increase (Decrease) in Income Taxes	3.1
Unrecognized Tax Benefits	133.1
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	42.0
Unrecognized Tax Benefits, Period Increase (Decrease)	10.9
Unrecognized tax benefits, reduction of accrued interest	$ 0.4