Summary of Significant Accounting Policies - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)	Mar. 31, 2019 leases	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Summary of Accounting Policies [Line Items]
Equity method investment ownership percentage	50.00%
Customer Billing Term	30 days
Number of leases | leases		23,600
Operating lease liability	$ 1,453.4		$ 1,200.0
Operating lease asset	$ 1,457.0		1,200.0	$ 0.0
Net asset			1,300.0
Cumulative effect of a new accounting standard			$ 24.8	$ (24.8)
Minimum
Summary of Accounting Policies [Line Items]
Equity method investment ownership percentage	20.00%
Intangible asset, useful life	5 years
Customer contract term	28 days
Operating lease term	1 month
Prepaid lease term	1 month
Maximum
Summary of Accounting Policies [Line Items]
Equity method investment ownership percentage	50.00%
Cost method investment ownership percentage	20.00%
Intangible asset, useful life	40 years
Customer contract term	12 months
Prepaid lease term	12 months
Direct Lease Acquisition Cost | Minimum
Summary of Accounting Policies [Line Items]
Intangible asset, useful life	28 days
Direct Lease Acquisition Cost | Maximum
Summary of Accounting Policies [Line Items]
Intangible asset, useful life	1 year