Related Party Transactions - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Affiliates
Related Party Transaction [Line Items]
Accounts receivable, related parties, current	$ 31.0		$ 31.0		$ 34.1
Accounts receivable, related parties, noncurrent	215.9		215.9		$ 232.8
Management services agreement, transaction advisory fees | TPG Capital, L.P. and PAG Asia Capital Limited
Related Party Transaction [Line Items]
Transaction advisory fees related to integration and financing activities	$ 0.6	$ 0.6	1.0	$ 0.6
Management advisory services, annual fee | TPG Capital, L.P. and PAG Asia Capital Limited
Related Party Transaction [Line Items]
Transaction advisory fees related to integration and financing activities			4.3
Management advisory services, termination fee | TPG Capital, L.P. and PAG Asia Capital Limited
Related Party Transaction [Line Items]
Transaction advisory fees related to integration and financing activities			$ 11.9