Property and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Property and equipment
Total	$ 2,713.4	$ 2,332.7
Less: Accumulated depreciation	(604.8)	(526.2)
Property and equipment, net	2,108.6	1,806.5
Buildings and leasehold improvements
Property and equipment
Total	1,633.3	1,438.4
Capitalized interest included in buildings and leasehold improvements	27.8	27.1
Furniture, fixtures and equipment
Property and equipment
Total	$ 1,080.1	$ 894.3