Goodwill and Other Intangible Assets, Net - Narrative (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($) segment	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Number of reportable segments | segment	2
Finite-Lived Intangible Assets [Line Items]
Other assets	$ 686.4		$ 417.8
Finite-lived intangible assets	$ (818.4)		$ (793.7)
Accounting Standards Update 2016-02
Finite-Lived Intangible Assets [Line Items]
Other assets		$ 1.9
Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization period for other intangible assets	1 year
Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period for other intangible assets	18 years
Off-Market Favorable Lease | Accounting Standards Update 2016-02
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets		$ 1.9