Consolidated Statement Of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating activities [Abstract]
Net income	$ 164	$ 259
Depreciation	129	117
Amortization of intangibles	7	14
Amortization of deferred financing charges	4	3
Call premium on senior notes	12	2
Write-off of deferred financing costs	5	1
Earnings of affiliates, net of dividends received	3	12
Stock compensation expense	11	14
Deferred income taxes	1	(97)
Pension contributions, net	(12)	(14)
Impairment of long-lived assets		36
Change in working capital	(142)	(92)
Other, net		11
Net cash provided by operating activities	182	266
Investing activities [Abstract]
Purchases of property, plant and equipment	(198)	(192)
Acquisition of business	(18)
Purchases of marketable securities	(41)	(29)
Proceeds from sales of marketable securities	47	15
Proceeds from maturities of marketable securities	33	21
Other	(10)	(3)
Net cash used in investing activities	(187)	(188)
Financing activities [Abstract]
Net change in short-term debt	14	3
Repayment of letters of credit		(4)
Proceeds from long-term debt	441	18
Repayment of long-term debt	(378)	(59)
Call premium on senior notes	(12)	(2)
Deferred financing payments	(10)
Dividends paid to common stockholders	(26)	(27)
Distributions to noncontrolling interests	(16)	(8)
Repurchases of common stock	(81)	(245)
Other	(4)	6
Net cash used in financing activities	(72)	(318)
Net decrease in cash and cash equivalents	(77)	(240)
Cash and cash equivalents - beginning of period	791	1,121
Effect of exchange rate changes on cash balances	13	(64)
Cash and cash equivalents – end of period	$ 727	$ 817