Income Tax Expense Level 4 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
INCOME TAX EXPENSE [Abstract]
Effective Income Tax Rate, Continuing Operations	26.70%	30.70%	20.50%	31.30%
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority	$ 10.4		$ 10.4