CONSOLIDATED CASH FLOW STATEMENTS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
OPERATING ACTIVITIES
Net Earnings	$ 2,765	$ 3,331	[1]	$ 3,309	[1]
Adjustments to Reconcile Net Earnings to Net Cash
Depreciation	1,383	1,349	[1]	1,331	[1]
Deferred Income Taxes	180	273		279
Gains on Property Dispositions	(35)	(151)		(154)
Cash Payments for Restructuring Charge	0	0		(15)
Other Operating Activities	(32)	(69)		(117)
Changes in Operating Assets and Liabilities:
Accounts Receivable	83	45		(46)
Other Current Assets	(75)	68		101
Accounts Payable	(20)	98		104
Income and Other Taxes Payable	39	2		(104)
Other Current Liabilities	(25)	(96)		(47)
Net Cash Provided by Operating Activities	4,263	4,850		4,641
INVESTING ACTIVITIES
Property Additions	(1,626)	(1,657)		(1,745)
Purchases of Short-term Investments	(426)	(2,838)		(736)
Proceeds from Sales of Short-term Investments	1,424	2,108		505
Proceeds from Property Dispositions	56	254		319
Other Investing Activities	(77)	31		(27)
Net Cash Used in Investing Activities	(649)	(2,102)		(1,684)
FINANCING ACTIVITIES
Long-term Debt Issued (Note 10)	1,000	2,000		3,000
Long-term Debt Repaid (Note 10)	(745)	(518)		(19)
Dividends Paid	(797)	(763)		(751)
Shares Repurchased	(867)	(3,373)		(4,671)
Other Financing Activities	(34)	6		(59)
Net Cash Used in Financing Activities	(1,443)	(2,648)		(2,500)
Net Increase in Cash and Cash Equivalents	2,171	100		457
CASH AND CASH EQUIVALENTS
Cash and Cash Equivalents at Beginning of Period	958	858		401
Cash and Cash Equivalents at End of Period	3,129	958		858
SUPPLEMENTAL CASH FLOW INFORMATION
Interest Paid - Net of Amounts Capitalized	750	717		614
Income Taxes Paid	$ 664	$ 691		$ 814

[1] Certain prior year data has been reclassified to conform to the current presentation.