Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenue	$ 945	$ 807	$ 2,680	$ 2,843
Operating Income (Loss)	71	(60)	83	(1,379)
Operating income (loss) before impairment and other charges	63	(25)	67	(38)
Restructuring Charges	0	(31)	0	(114)
Interest Expense	(69)	(64)	(211)	(181)
Other Expense, Net	(4)	(20)	(19)	(65)
Loss Before Income Taxes	(61)	(159)	(206)	(1,640)
Assets	5,148		5,148		$ 5,434
Elimination of Intercompany margins associated with transfers of assets and inventory	(1)	9	0	27
Impairments and Other Charges (Credits), Net	0	0	0	(1,057)
Impairment, Long-Lived Asset, Held-for-Use	0	0	0	(1,057)
Other Cost and Expense, Operating	8	(4)	16	(170)
Gain (Loss) on Extinguishment of Debt	(59)	0	(59)	0
Loss on Termination of ABL Credit Agreement [Line Items]	0	(15)	0	(15)
Operating Segments
Segment Reporting Information [Line Items]
Revenue	945	807	2,680	2,843
Operating Income (Loss)	79	3	118	42
Operating Segments | Western Hemisphere
Segment Reporting Information [Line Items]
Revenue	441	316	1,256	1,214
Operating Income (Loss)	45	(2)	97	4
Operating Segments | Eastern Hemisphere
Segment Reporting Information [Line Items]
Revenue	504	491	1,424	1,629
Operating Income (Loss)	34	5	21	38
Corporate, Non-Segment
Segment Reporting Information [Line Items]
General and Administrative Expense	$ (16)	$ (28)	$ (51)	$ (80)