Property and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 134.8
Operating Leases, Future Minimum Payments, Due in Two Years	120.9
Operating Leases, Future Minimum Payments, Due in Three Years	109.9
Operating Leases, Future Minimum Payments, Due in Four Years	93.3
Operating Leases, Future Minimum Payments, Due in Five Years	75.3
Operating Leases, Future Minimum Payments, Due in Rolling after Year Five	339.4
Depreciation	716.2	$ 717.6	$ 759.1
Land	197.6	220.6
Buildings	6,917.8	6,786.5
Equipment	7,864.7	7,988.5
Construction in progress	1,797.5	1,665.3
Property and equipment, gross	16,777.6	16,660.9
Less accumulated depreciation	(8,525.0)	(8,607.4)
Property and equipment, net	8,252.6	8,053.5
Operating Leases, Rent Expense	$ 221.0	$ 225.7	$ 227.3
Building [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	12 years
Building [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	50 years
Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	25 years