Condensed Consolidated Statements of Cash Flow (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating activities
Net loss	$ (205)	$ (321)
Depreciation and amortization	57	46
Gain on divestitures	0	(77)
Assets impairment charge	0	144
Undistributed (gain) loss from equity method investments	(8)	38
Stock-based compensation	5	4
Deferred income taxes	0	(1)
Other, net	4	(9)
Change in operating assets and liabilities:
Receivables, gross	33	50
Accrued expenses	(22)	22
Related party receivables and payables, net	0	2
Accounts payable	9	(86)
Prepaid expenses and other contract assets	(9)	29
Inventories, gross	(32)	14
Income taxes	(15)	21
Other current assets and liabilities, net	4	8
Net cash used in operating activities	(179)	(116)
Investing activities
Proceeds from divestitures	0	176
Capital expenditures	(30)	(51)
Equity method investment	12
Equity method investment		(26)
Net cash provided by investing activities	(18)	99
Financing activities
Dividend paid to non-controlling interest	0	(5)
(Payments for) proceeds from long-term debt	1	(1)
(Payments for) proceeds from short-term debt	(2)	15
Proceeds from exercise of stock options	1	0
Net cash (used in) provided by financing activities	0	9
Effect of exchange rate changes on cash and cash equivalents	(5)	0
Increase (decrease) in cash and cash equivalents and restricted cash	(202)	(8)
Cash and cash equivalents and restricted cash at beginning of period	758	859
Cash and cash equivalents at end of period	$ 556	$ 851