Condensed 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
Net income (loss)	$ 555	$ 146	$ 853	$ 436
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(45)	13	(36)	21
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	158	(21)	78	(76)
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Reclassification Adjustments and Tax	0	2	0	2
Net change in unrealized costs associated with certain retirement plans	0	(1)	0	(1)
Total other comprehensive income (loss)	112	(7)	42	(54)
Total comprehensive income (loss)	$ 668	$ 139	$ 895	$ 382