Income Taxes (Unrecognized Tax Benefits) (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes
Reserve for unrecognized tax benefits (including interest and penalties)		$ 59,300,000	$ 53,000,000	$ 41,300,000
Amounts that would affect the effective tax rate if recognized		59,300,000	53,000,000	41,300,000
Accrual of interest and penalties related to uncertain tax positions		8,300,000	7,200,000	4,600,000
Tax expense related to an increase in liabilities for interest and penalties		2,600,000	3,900,000	1,500,000
Reduction due to lapse of statute of limitations (with 2013 estimate)	$ (6,900,000)	$ (3,746,000)	$ (2,278,000)	$ (1,998,000)