BUSINESS SEGMENTS Reconciliation from Segment Totals to Consolidated (Details) - USD ($)	3 Months Ended					9 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting, Revenue Reconciling Item
Charges for impairment of assets	$ 0			$ 6,000,000	$ 147,000,000	$ 1,000,000	$ 153,000,000
Insurance recoveries	0
Sales to unaffiliated customers	1,910,000,000			1,872,000,000		5,840,000,000	5,373,000,000
Third party and intersegment revenue, net	2,095,000,000			2,051,000,000		6,438,000,000	5,917,000,000
Net contribution to earnings	333,000,000			201,000,000		1,199,000,000	639,000,000
Interest expense, net of capitalized interest	(93,000,000)			(98,000,000)		(278,000,000)	(297,000,000)
Earnings before income taxes	240,000,000			103,000,000		921,000,000	342,000,000
Income taxes	15,000,000			27,000,000		(80,000,000)	(31,000,000)
Net earnings	255,000,000			130,000,000		841,000,000	311,000,000
Charges (recoveries) for product remediation, net	0			190,000,000		0	240,000,000
Intersegment eliminations
Segment Reporting, Revenue Reconciling Item
Intersegment sales	(185,000,000)			(179,000,000)		(598,000,000)	(544,000,000)
Operating segments
Segment Reporting, Revenue Reconciling Item
Net contribution to earnings	375,000,000			218,000,000		1,371,000,000	752,000,000
Unallocated items
Segment Reporting, Revenue Reconciling Item
Net contribution to earnings	(42,000,000)			(17,000,000)		(172,000,000)	(113,000,000)
Timberlands
Segment Reporting, Revenue Reconciling Item
Charges for impairment of assets					$ 147,000,000
Sales to unaffiliated customers	468,000,000			491,000,000		1,455,000,000	1,446,000,000
Intersegment sales	185,000,000			179,000,000		598,000,000	544,000,000
Net contribution to earnings	126,000,000			131,000,000		476,000,000	267,000,000
RE & ENR
Segment Reporting, Revenue Reconciling Item
Sales to unaffiliated customers	96,000,000			82,000,000		205,000,000	181,000,000
Net contribution to earnings	36,000,000			47,000,000		83,000,000	96,000,000
Wood Products
Segment Reporting, Revenue Reconciling Item
Charges for impairment of assets				6,000,000
Insurance recoveries		$ 5,000,000	$ 20,000,000			25,000,000
Sales to unaffiliated customers	1,346,000,000			1,299,000,000		4,180,000,000	3,746,000,000
Net contribution to earnings	$ 213,000,000			40,000,000		812,000,000	389,000,000
Charges (recoveries) for product remediation, net		$ 25,000,000		$ 190,000,000		$ 25,000,000	$ 240,000,000