Consolidated Statements of Income (Loss) (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenue	$ 1,341	$ 1,384	$ 4,007	$ 4,763
Cost of revenue	1,156	1,245	3,435	4,263
Gross profit	185	139	572	500
Selling, general and administrative	228	213	691	733
Goodwill and indefinite-lived intangible asset impairment				1,378
Long-lived asset impairment				513
Operating loss	(43)	(74)	(119)	(2,124)
Interest and financial costs	(19)	(21)	(58)	(65)
Interest income	3		7	5
Equity loss in unconsolidated affiliates	(2)	(11)	(6)	(250)
Other income (expense), net	1	(8)	(25)	(19)
Loss before income taxes	(60)	(114)	(201)	(2,453)
Provision (benefit) for income taxes	5	(61)	1	(264)
Net loss	(65)	(53)	(202)	(2,189)
Net income attributable to noncontrolling interests	4	2	8	6
Net loss attributable to Company	$ (69)	$ (55)	$ (210)	$ (2,195)
Net loss attributable to Company per share:
Basic	$ (0.18)	$ (0.14)	$ (0.54)	$ (5.72)
Diluted	$ (0.18)	$ (0.14)	$ (0.54)	(5.72)
Cash dividends per share				$ 0.05
Weighted average shares outstanding:
Basic	387	385	386	384
Diluted	387	385	386	384