Consolidated Statement Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating activities [Abstract]
Net income	$ 116	$ 653	$ 180
Depreciation	220	173	158
Amortization of intangibles	13	9	16
Amortization of deferred financing charges	5	5	5
Call premium on debt	15	12	2
Write-off of deferred financing costs	4	5	1
Earnings of affiliates, net of dividends received	(3)	(3)	12
Stock compensation expense	23	17	14
Deferred income taxes	179	(480)	(10)
Pension contributions, net	(6)	(16)	(18)
(Gain) loss on sale of subsidiaries	(3)	80
Loss on disposal group held for sale	27
Impairment of long-lived assets			36
Impairment of equity affiliate			39
Change in working capital	(8)	(51)	(41)
Change in other noncurrent assets and liabilities	(9)	(1)	(7)
Other, net	(19)	(19)	19
Net cash provided by operating activities	554	384	406
Investing activities [Abstract]
Purchases of property, plant and equipment	(393)	(322)	(260)
Acquisition of businesses, net of cash acquired	(187)	(78)
Purchases of marketable securities	(35)	(93)	(43)
Proceeds from sales of marketable securities	1	47	17
Proceeds from maturities of marketable securities	27	47	30
Proceeds from sale of subsidiaries	3	34
Other	3		(2)
Net cash used in investing activities	(581)	(365)	(258)
Financing activities [Abstract]
Net change in short-term debt	(90)	9	(5)
Repayment of letters of credit			(4)
Proceeds from long-term debt	676	441	18
Repayment of long-term debt	(640)	(382)	(60)
Call premium on debt	(15)	(12)	(2)
Deferred financing payments	(9)	(11)
Dividends paid to common stockholders	(35)	(35)	(37)
Distributions to noncontrolling interests	(12)	(17)	(9)
Repurchases of common stock		(81)	(311)
Other	5		7
Net cash used in financing activities	(120)	(88)	(403)
Net decrease in cash and cash equivalents	(147)	(69)	(255)
Cash and cash equivalents - beginning of period	707	791	1,121
Effect of exchange rate changes on cash balances	43	(15)	(75)
Cash and cash equivalents - end of period	$ 603	$ 707	$ 791