Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Operating Activities
Net income	$ 4,129	$ 3,753
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,045	1,975
Deferred income taxes	257	94
Other, net	(287)	(141)
Changes in current assets and liabilities:
Accounts receivable, net	(21)	42
Materials and supplies	(25)	16
Other current assets	239	64
Accounts payable and other current liabilities	(493)	(313)
Net cash provided by operating activities	5,844	5,490
Investing Activities
Capital expenditures excluding equipment	(2,375)	(2,433)
Acquisition of equipment	(222)	(346)
Purchases of investments and investments in time deposits	(1)	(29)
Other, net	(59)	(144)
Net cash used in investing activities	(2,657)	(2,952)
Financing Activities
Proceeds from issuance of long-term debt	900	1,300
Payments on long-term debt and finance leases	(883)	(1,237)
Cash distributions	(3,200)	(2,800)
Other, net	(13)	(18)
Net cash used in financing activities	(3,196)	(2,755)
Increase (decrease) in cash and cash equivalents	(9)	(217)
Cash and cash equivalents:
Beginning of period	2,004	2,148
End of period	1,995	1,931
Supplemental Cash Flow Information
Interest paid, net of amounts capitalized	865	798
Capital investments accrued but not yet paid	173	189
Income taxes paid, net of refunds	$ 1,097	$ 1,099