Goodwill (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) reporting_unit	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Number of reporting units | reporting_unit	1
Stockholders’ (deficit) equity	$ (1,816,921,000)	$ (1,523,874,000)	$ (792,015,000)	$ (166,491,000)
Goodwill	2,289,985,000	2,286,582,000
Goodwill acquired during period	3,403,000
Impairment losses for goodwill	0	$ 0	$ 0
Accumulated impairment of goodwill since the merger	$ 4,766,190,000