Business Acquisition and Dispositions - Pro forma (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2017	Jul. 02, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Net loss attributable to the Company	$ (538)	$ 46	$ 277	$ 139	$ (492)
GE Transaction Agreement
Business Acquisition [Line Items]
Revenue					21,841
Net loss					(586)
Net loss attributable to the Company					$ (592)
Loss per Class A share - basic (in dollars per share)					$ (0.34)
Loss per Class A share - diluted (in dollars per share)					$ (0.34)