Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net loss	$ (2,537)	$ (6,093)	$ (22)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	352	533	690
Deferred income taxes	(65)	(426)	(63)
Stock-based compensation	105	130	110
Loss on extinguishment of debt	8	26
Equity loss in unconsolidated affiliates	260	13	3
Goodwill and indefinite-lived intangible asset impairment	1,378	3,612
Long-lived asset impairment	513	2,209
Provision for inventory losses	367	659	49
Other, net	16	16	(7)
Change in operating assets and liabilities, net of acquisitions:
Receivables	574	275	(72)
Inventories	429	104	(7)
Contract assets	30	(70)	(68)
Prepaid and other current assets	22	(45)	67
Accounts payable	(226)	(19)	196
Accrued liabilities	(110)	(194)	(186)
Contract liabilities	(74)	(34)	(62)
Income taxes payable	9	(25)	(15)
Other assets/liabilities, net	(125)	43	(92)
Net cash provided by operating activities	926	714	521
Cash flows from investing activities:
Purchases of property, plant and equipment	(226)	(233)	(244)
Business acquisitions, net of cash acquired	(14)	(180)	(280)
Other, net	96	98	67
Net cash used in investing activities	(144)	(315)	(457)
Cash flows from financing activities:
Borrowings against lines of credit and other debt	36	511
Payments against lines of credit and other debt	(217)	(1,000)
Financing leases	(31)	(32)	(8)
Cash dividends paid	(19)	(77)	(76)
Debt issuance and extinguishment costs	(8)	(36)
Other	(20)	(13)	54
Net cash used in financing activities	(259)	(647)	(30)
Effect of exchange rates on cash	(2)	(8)	(44)
Increase (decrease) in cash and cash equivalents	521	(256)	(10)
Cash and cash equivalents, beginning of period	1,171	1,427	1,437
Cash and cash equivalents, end of period	1,692	1,171	1,427
Cash payments during the period for:
Interest	83	85	90
Income taxes	$ (9)	$ 144	$ 64