BUSINESS SEGMENTS - Sales and Net Contribution (Charge) to Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Revenue Reconciling Item
Sales to unaffiliated customers	$ 10,201	$ 7,532	$ 6,554
Net contribution (charge) to earnings	3,629	1,425	165
Timberlands
Segment Reporting, Revenue Reconciling Item
Sales to unaffiliated customers	1,636	1,466	1,618
Real Estate & ENR
Segment Reporting, Revenue Reconciling Item
Sales to unaffiliated customers	344	276	313
Wood Products
Segment Reporting, Revenue Reconciling Item
Sales to unaffiliated customers	8,221	5,790	4,623
Operating segments | Timberlands
Segment Reporting, Revenue Reconciling Item
Sales to unaffiliated customers	1,636	1,466	1,618
Net contribution (charge) to earnings	464	455	347
Operating segments | Real Estate & ENR
Segment Reporting, Revenue Reconciling Item
Sales to unaffiliated customers	344	276	313
Net contribution (charge) to earnings	210	86	144
Operating segments | Wood Products
Segment Reporting, Revenue Reconciling Item
Sales to unaffiliated customers	8,221	5,790	4,623
Net contribution (charge) to earnings	3,211	1,340	353
Unallocated Items
Segment Reporting, Revenue Reconciling Item
Sales to unaffiliated customers	0	0	0
Net contribution (charge) to earnings	(256)	(456)	(679)
Intersegment eliminations
Segment Reporting, Revenue Reconciling Item
Sales to unaffiliated customers	(535)	(471)	(504)
Intersegment eliminations | Timberlands
Segment Reporting, Revenue Reconciling Item
Sales to unaffiliated customers	535	471	503
Intersegment eliminations | Real Estate & ENR
Segment Reporting, Revenue Reconciling Item
Sales to unaffiliated customers	0	0	1
Intersegment eliminations | Wood Products
Segment Reporting, Revenue Reconciling Item
Sales to unaffiliated customers	$ 0	$ 0	$ 0