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Property and Equipment (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Property and Equipment [Abstract]      
Depreciation $ 774.8 $ 754.0 $ 732.4
Land 198.7 201.4  
Buildings 6,489.9 6,373.8  
Equipment 7,752.7 7,542.9  
Construction in progress 1,205.4 799.9  
Property and equipment, gross 15,646.7 14,918.0  
Less accumulated depreciation (7,671.2) (7,157.8)  
Property and equipment, net 7,975.5 7,760.2  
Interest Costs, Capitalized During Period 24.1 21.0 25.7
Operating Leases, Rent Expense $ 227.2 $ 262.2 $ 267.4