Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating activities
Net income (loss)	$ (51)	$ 233	$ 440
Depreciation	345	322	260
Amortization	20	17	10
Amortization of deferred financing charges	8	6	4
Call premium on debt		7
Write-off of deferred financing costs	8	2
Earnings of affiliates, net of dividends received	7	(9)	(4)
Stock compensation expense	14	19	16
Deferred income taxes	(35)	(137)	(64)
Pension expense, net	3	211	3
Impairment of goodwill and indefinite-lived intangible asset	51	6	20
Change in working capital	47	(17)	(113)
Change in other noncurrent assets and liabilities	(20)	(18)	(12)
Other, net	(11)	(5)	8
Net cash provided by operating activities	386	637	568
Investing activities
Purchases of property, plant and equipment	(326)	(426)	(325)
Acquisition of businesses, net of cash acquired	(6)	(668)	(153)
Proceeds from previous acquisition			9
Purchases of marketable securities	(44)	(33)	(37)
Proceeds from sales of marketable securities	5	6	15
Proceeds from maturities of marketable securities	36	29	37
Proceeds from sale of equity affiliate	21
Proceeds from sale of subsidiaries, net of cash disposed		1	(6)
Settlements of undesignated derivatives	(5)	(20)
Other, net	(8)	(12)	(2)
Net cash used in investing activities	(327)	(1,123)	(462)
Financing activities
Net change in short-term debt	9	(3)	(21)
Proceeds from long-term debt	508	975
Repayment of long-term debt	(480)	(423)	(13)
Call premium on debt		(7)
Deferred financing payments	(13)	(20)	(1)
Dividends paid to common stockholders	(15)	(58)	(58)
Distributions to noncontrolling interests	(11)	(19)	(42)
Sale of interest to noncontrolling shareholder	9	53
Contributions from noncontrolling interests	4	4	25
Payments to acquire noncontrolling interests	(7)
Deconsolidation of non-wholly owned subsidiary	(14)
Payments to acquire redeemable noncontrolling interests			(43)
Repurchases of common stock		(25)	(25)
Other, net	(2)	2	(2)
Net cash provided by (used in) financing activities	(12)	479	(180)
Net increase (decrease) in cash, cash equivalents and restricted cash	47	(7)	(74)
Cash, cash equivalents and restricted cash - beginning of period	518	520	610
Effect of exchange rate changes on cash balances	2	5	(16)
Cash, cash equivalents and restricted cash - end of period	$ 567	$ 518	$ 520