CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 174	$ 24	$ 262	$ 15
Other comprehensive (loss) income:
Foreign currency translation adjustment—net of taxes	(67)	52	(50)	72
Unrealized loss on securities, net of tax	(1)	0	(1)	0
Defined benefit plans—net of taxes	7	1	6	1
Total other comprehensive income	(61)	53	(45)	73
Comprehensive income	113	77	217	88
Less: Comprehensive income attributable to noncontrolling interests	26	21	51	35
Comprehensive income attributable to common stockholders	$ 87	$ 56	$ 166	$ 53