Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Operating Activities
Net income	$ 3,753	$ 3,732
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,975	1,957
Deferred income taxes	94	202
Other, net	(141)	(127)
Changes in current assets and liabilities:
Accounts receivable, net	42	9
Materials and supplies	16	(110)
Other current assets	64	26
Accounts payable and other current liabilities	(313)	(611)
Net cash provided by operating activities	5,490	5,078
Investing Activities
Capital expenditures excluding equipment	(2,433)	(2,606)
Acquisition of equipment	(346)	(252)
Purchases of investments and investments in time deposits	(29)	(24)
Other, net	(144)	(108)
Net cash used in investing activities	(2,952)	(2,990)
Financing Activities
Proceeds from issuance of long-term debt	1,300	1,600
Payments on long-term debt and finance leases	(1,237)	(1,539)
Cash distributions	(2,800)	(1,100)
Other, net	(18)	(15)
Net cash used in financing activities	(2,755)	(1,054)
Increase (decrease) in cash and cash equivalents	(217)	1,034
Cash and cash equivalents:
Beginning of period	2,148	1,938
End of period	1,931	2,972
Supplemental Cash Flow Information
Interest paid, net of amounts capitalized	798	800
Capital investments accrued but not yet paid	189	406
Income taxes paid, net of refunds	$ 1,099	$ 1,174