Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Operating Activities
Net earnings (loss)	$ 434	$ 266	$ 783	$ 125
Depreciation, amortization and cost of timber harvested	306	312	615	635
Deferred income tax provision (benefit), net			5	12
Restructuring and other charges, net	174	18	204	26
Net (gains) losses on sales of equity method investments	(130)	0	(204)	(33)
Net (gains) losses on sales and impairments of businesses	(9)	8	(7)	352
Equity method dividends received			149	151
Equity (earnings) losses, net	(104)	(72)	(153)	(41)
Periodic pension (income) expense, net			(57)	16
Other, net			71	109
Changes in current assets and liabilities
Accounts and notes receivable			(496)	74
Contract assets			(62)	(11)
Inventories			110	65
Accounts payable and accrued liabilities			367	(37)
Interest payable			(2)	0
Other			(45)	96
Cash Provided By (Used For) Operations			1,278	1,539
Investment Activities
Invested in capital projects, net of insurance recoveries			(222)	(538)
Acquisitions, net of cash acquired			(80)	(64)
Proceeds from sales of equity method investments			800	250
Proceeds from sales of businesses, net of cash divested			90	0
Proceeds from sale of fixed assets			0	3
Other			(2)	15
Cash Provided By (Used For) Investment Activities			586	(334)
Financing Activities
Repurchases of common stock and payments of restricted stock tax withholding			(213)	(41)
Issuance of debt			4	579
Reduction of debt			(914)	(917)
Change in book overdrafts			2	(10)
Dividends paid			(403)	(403)
Net debt tender premiums paid			(188)	(25)
Other			(3)	0
Cash Provided By (Used For) Financing Activities			(1,715)	(817)
Cash Included in Assets Held for Sale			(45)	(13)
Effect of Exchange Rate Changes on Cash			7	(39)
Change in Cash and Temporary Investments			111	336
Cash and Temporary Investments
Beginning of period			595	511	$ 511
End of period	$ 706	$ 847	$ 706	$ 847	$ 595