Basis of Presentation (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) segment	Mar. 31, 2018 USD ($)	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of reportable segments | segment	2
Operating lease liability	$ 248.0
Operating lease assets	228.0			$ 0.0
Reclassification due to adoption of accounting standard	5.4
Property and equipment, net	7,989.7			$ 8,020.1
Depreciation, amortization and depletion	251.5	$ 263.1
Cash provided by operating activities	553.7	$ 581.4
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liability			$ 256.3
Operating lease assets			236.2
Adjustments for New Accounting Principle, Early Adoption ASU 2018-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets			28.7
Property and equipment, net			$ (28.7)
Depreciation, amortization and depletion	8.1
Cash provided by operating activities	$ 5.2