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Income Taxes (Unrecognized Tax Benefits) (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes
Reserve for unrecognized tax benefits (including interest and penalties)		$ 53,000,000	$ 41,300,000	$ 37,600,000
Amounts that would affect the effective tax rate if recognized		53,000,000	41,300,000	37,600,000
Accrual of interest and penalties related to uncertain tax positions		7,200,000	4,600,000	4,000,000
Tax expense related to an increase in liabilities for interest and penalties		3,900,000	1,500,000	1,500,000
Reduction due to lapse of statute of limitations (with 2012 estimate)	$ (4,000,000)	$ (2,278,000)	$ (1,998,000)	$ (2,730,000)

This element represents the amount of interest expense accrued as of the date of the statement of financial position for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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- Definition

This element represents interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

+ References+ Details