CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
OPERATING ACTIVITIES
Net income	$ 1,919	$ 2,107	$ 1,707
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	860	1,009	1,315
Deferred income taxes	20	27	41
Provision for uncollectible accounts	60	27	66
Accrued interest on affiliate note	28	57	61
Net loss on early retirement of debt	0	8	63
Changes in current assets and liabilities:
Accounts receivable	(68)	36	88
Accounts payable	(29)	(41)	(58)
Accrued income and other taxes	(5)	(1)	1
Other current assets and liabilities, net	(26)	(176)	(220)
Changes in other noncurrent assets and liabilities, net	(28)	(13)	52
Changes in affiliate obligations, net	(90)	(12)	(70)
Other, net	(15)	5	25
Net cash provided by operating activities	2,626	3,033	3,071
INVESTING ACTIVITIES
Capital expenditures	(849)	(797)	(1,091)
Changes in advances to affiliates			1,842
Changes in advances to affiliates	(576)	0
Proceeds from sale of property, plant and equipment and other assets	76	46	3
Net cash (used in) provided by investing activities	(1,349)	(751)	754
FINANCING ACTIVITIES
Net proceeds from issuance of long-term debt	0	0	115
Payment of note payable - affiliate	(1,215)	0	0
Payments of long-term debt	(1)	(1,186)	(2,796)
Dividends paid	0	(570)	(1,725)
Changes in advances from affiliates	(55)	(537)	592
Net cash used in financing activities	(1,271)	(2,293)	(3,814)
Net increase (decrease) in cash, cash equivalents and restricted cash	6	(11)	11
Cash, cash equivalents and restricted cash at beginning of period	4	15	4
Cash, cash equivalents and restricted cash at end of period	10	4	15
Supplemental cash flow information:
Income taxes paid, net	(673)	(697)	(556)
Interest paid, including affiliate interest (net of capitalized interest of $29, $19 and $29)	(113)	(188)	(310)
Supplemental noncash information of investing activities:
Sale of property, plant and equipment in exchange for receivable	0	56	0
Cash, cash equivalents and restricted cash:
Cash and cash equivalents	8	2	14
Restricted cash - noncurrent	2	2	1
Total	$ 10	$ 4	$ 15