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Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]      
United States federal statutory rate 35.00% 35.00% 35.00%
Provision for income taxes at United States federal statutory rate of 35% $ 280.9 $ 210.3 $ 196.3
State and local income taxes, net of federal income tax benefit 5.6 3.9 1.4
Taxes on foreign income which differ from the United States statutory rate (34.7) (19.8) (31.8)
Tax effect of permanent differences (7.6) 11.5 (5.8)
Change in valuation allowance 9.3 (64.3) (150.7)
Change in tax contingency reserves 25.7 20.8 23.1
Research and development tax credits (19.9) (26.3) (7.7)
Other (0.8) 1.8 (0.2)
Income tax provision $ 258.5 $ 137.9 $ 24.6