Consolidated Statement Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating activities [Abstract]
Net income	$ 653	$ 180	$ 328
Depreciation	173	158	164
Amortization of intangibles	9	16	49
Amortization of deferred financing charges	5	5	5
Call premium on senior notes	12	2	15
Write-off of deferred financing costs	5	1	4
Earnings of affiliates, net of dividends received	(3)	12	4
Stock compensation expense	17	14	16
Deferred income taxes	(480)	(10)	(199)
Pension expense (contributions), net	(16)	(18)	30
Loss on sale of subsidiaries	80
Impairment of long-lived assets		36
Impairment of equity affiliate		39
Loss on disposal group held for sale			78
Interest payment received on payment-in-kind note receivable			40
Change in working capital	(51)	(41)	(39)
Change in other noncurrent assets and liabilities	(1)	(7)	(16)
Other, net	(19)	19	31
Net cash provided by operating activities	384	406	510
Investing activities [Abstract]
Purchases of property, plant and equipment	(322)	(260)	(234)
Acquisition of businesses	(78)
Principal payment received on payment-in-kind note receivable			35
Purchases of marketable securities	(93)	(43)	(84)
Proceeds from sales of marketable securities	47	17	7
Proceeds from maturities of marketable securities	47	30	21
Proceeds from sale of subsidiaries	34		9
Other		(2)
Net cash used in investing activities	(365)	(258)	(246)
Financing activities [Abstract]
Net change in short-term debt	9	(5)	(8)
Proceeds from letters of credit			12
Repayment of letters of credit		(4)	(8)
Proceeds from long-term debt	441	18	448
Repayment of long-term debt	(382)	(60)	(372)
Call premium on senior notes	(12)	(2)	(15)
Deferred financing payments	(11)		(7)
Dividends paid to preferred stockholders			(8)
Dividends paid to common stockholders	(35)	(37)	(32)
Distributions to noncontrolling interests	(17)	(9)	(9)
Repurchases of common stock	(81)	(311)	(260)
Other		7	5
Net cash used in financing activities	(88)	(403)	(254)
Net increase (decrease) in cash and cash equivalents	(69)	(255)	10
Cash and cash equivalents - beginning of period	791	1,121	1,256
Effect of exchange rate changes on cash balances	(15)	(75)	(118)
Less: cash of disposal group held for sale			(27)
Cash and cash equivalents - end of period	$ 707	$ 791	$ 1,121