CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
OPERATING ACTIVITIES
Net income	$ 344	$ 506	$ 943	$ 981
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization			1,635	2,191
Deferred income taxes			249	279
Provision for uncollectible accounts			56	53
Net gain on early retirement of debt			0	(8)
Stock-based compensation	25	42	48	62
Changes in current assets and liabilities:
Accounts receivable			32	4
Accounts payable			79	(181)
Accrued income and other taxes			13	(29)
Other current assets and liabilities, net			(430)	(208)
Retirement benefits			(86)	(131)
Changes in other noncurrent assets and liabilities, net			136	120
Other, net			96	31
Net cash provided by operating activities			2,771	3,164
INVESTING ACTIVITIES
Capital expenditures			(1,338)	(1,362)
Proceeds from sale of property, plant and equipment and other assets			65	66
Other, net			3	1
Net cash used in investing activities			(1,270)	(1,295)
FINANCING ACTIVITIES
Net proceeds from issuance of long-term debt			0	1,881
Payments of long-term debt			(1,532)	(2,464)
Net proceeds from (payments on) revolving line of credit			600	(150)
Dividends paid			(525)	(568)
Other, net			(32)	(49)
Net cash used in financing activities			(1,489)	(1,350)
Net increase in cash, cash equivalents and restricted cash			12	519
Cash, cash equivalents and restricted cash at beginning of period			409	427
Cash, cash equivalents and restricted cash at end of period	421	946	421	946
Supplemental cash flow information:
Income taxes paid, net			(58)	(73)
Interest paid (net of capitalized interest of $32 and $26)			(699)	(744)
Cash, cash equivalents and restricted cash:
Cash and cash equivalents	360	935	360	935
Cash and cash equivalents included in Assets held for sale	48	0	48	0
Restricted cash included in Other current assets	1	2	1	2
Restricted cash included in Other, net noncurrent assets	12	9	12	9
Total	$ 421	$ 946	$ 421	$ 946