Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Activities
Net earnings (loss)	$ 849	$ 906	$ 285
Adjustments to reconcile net earnings (loss) to net cash provided by (used in) operating activities
Asset impairments	0	2	126
Depreciation, amortization and accretion	310	295	363
Pension and postretirement net periodic benefit cost	(80)	(54)	(52)
Pension and postretirement contributions	(363)	(350)	(63)
Actuarial (gain) loss on pension and postretirement plans	46	103	127
Pension curtailments and settlements, net	0	0	(3)
Deferred income taxes, net	(152)	83	42
(Gain) loss on disposition of businesses and assets, net	5	2	8
Stock-based compensation	47	31	40
Undistributed earnings in unconsolidated affiliates	(52)	(24)	(5)
Other, net	12	15	7
Operating cash provided by (used in) discontinued operations	8	2	(2)
Changes in operating assets and liabilities
Trade receivables - third party and affiliates, net	(110)	(59)	61
Inventories	(97)	8	62
Other assets	(7)	39	(17)
Trade payables - third party and affiliates	126	7	(111)
Other liabilities	261	(113)	(6)
Net cash provided by (used in) operating activities	803	893	862
Investing Activities
Capital expenditures on property, plant and equipment	(267)	(246)	(232)
Acquisitions, net of cash acquired	(269)	(178)	(6)
Proceeds from sale of businesses and assets, net	1	12	4
Capital expenditures related to Fairway Methanol LLC	0	0	(288)
Other, net	(14)	(27)	(36)
Net cash provided by (used in) investing activities	(549)	(439)	(558)
Financing Activities
Net change in short-term borrowings with maturities of 3 months or less	111	(352)	350
Proceeds from short-term borrowings	182	53	80
Repayments of short-term borrowings	(124)	(90)	(83)
Proceeds from long-term debt	351	1,509	0
Repayments of long-term debt	(77)	(1,127)	(24)
Purchases of treasury stock, including related fees	(500)	(500)	(420)
Stock option exercises	1	6	3
Series A common stock dividends	(241)	(201)	(174)
(Distributions to) contributions from noncontrolling interests	(27)	(24)	214
Other, net	(27)	(33)	(12)
Net cash provided by (used in) financing activities	(351)	(759)	(66)
Exchange rate effects on cash and cash equivalents	35	(24)	(51)
Net increase (decrease) in cash and cash equivalents	(62)	(329)	187
Cash and cash equivalents as of beginning of period	638	967	780
Cash and cash equivalents as of end of period	$ 576	$ 638	$ 967