Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating Activities
Net income	$ 1,641	$ 1,630
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	594	572
Deferred and other income taxes	23	52
Other operating activities, net	(80)	(117)
Changes in current assets and liabilities:
Accounts receivable, net	(89)	(59)
Materials and supplies	(27)	13
Other current assets	(55)	(73)
Accounts payable and other current liabilities	(220)	(437)
Income and other taxes	335	259
Cash provided by operating activities	2,122	1,840
Investing Activities
Capital investments	(797)	(772)
Other investing activities, net	(5)	(33)
Cash used in investing activities	(802)	(805)
Financing Activities
Debt repaid	(1,358)	(647)
Dividends paid	(795)	(795)
Debt issued (Note 13)	400	1,199
Net issued/(paid) commercial paper (Note 13)	296	(102)
Share repurchase programs (Note 15)	0	(575)
Other financing activities, net	6	(7)
Cash used in financing activities	(1,451)	(927)
Net change in cash, cash equivalents, and restricted cash	(131)	108
Cash, cash equivalents, and restricted cash at beginning of year	1,074	987
Cash, cash equivalents, and restricted cash at end of period	943	1,095
Non-cash investing and financing activities:
Capital investments accrued but not yet paid	135	156
Common shares repurchased but not yet paid	5	15
Cash paid during the period for:
Income taxes, net of refunds	(46)	(35)
Interest, net of amounts capitalized	(463)	(454)
Cash and cash equivalents	925	1,079
Restricted cash equivalents in other current assets	10	7
Restricted cash equivalents in other assets	8	9
Total cash, cash equivalents and restricted cash equivalents per above	$ 943	$ 1,095