CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
OPERATING ACTIVITIES
Net (loss) income	$ (831)	$ 1,919	$ 2,107
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	823	860	1,009
Goodwill impairment	2,405	0	0
Deferred income taxes	22	20	27
Provision for uncollectible accounts	66	60	27
Accrued interest on affiliate note	0	28	57
Net loss on early retirement of debt	0	0	8
Changes in current assets and liabilities:
Accounts receivable	20	(68)	36
Accounts payable	14	(29)	(41)
Accrued income and other taxes	7	(5)	(1)
Other current assets and liabilities, net	(97)	(26)	(176)
Changes in other noncurrent assets and liabilities, net	17	(28)	(13)
Changes in affiliate obligations, net	(62)	(90)	(12)
Other, net	5	(15)	5
Net cash provided by operating activities	2,389	2,626	3,033
INVESTING ACTIVITIES
Capital expenditures	(1,062)	(849)	(797)
Changes in advances to affiliates	569		0
Changes in advances to affiliates		(576)
Proceeds from sale of property, plant and equipment and other assets	27	76	46
Net cash used in investing activities	(466)	(1,349)	(751)
FINANCING ACTIVITIES
Payment of note payable - affiliate	0	(1,215)	0
Payments of long-term debt	(2)	(1)	(1,186)
Dividends paid	(1,980)	0	(570)
Changes in advances from affiliates	61	(55)	(537)
Net cash used in financing activities	(1,921)	(1,271)	(2,293)
Net increase (decrease) in cash, cash equivalents and restricted cash	2	6	(11)
Cash, cash equivalents and restricted cash at beginning of period	10	4	15
Cash, cash equivalents and restricted cash at end of period	12	10	4
Supplemental cash flow information:
Income taxes paid, net	(509)	(673)	(697)
Interest paid, including affiliate interest (net of capitalized interest of $54, $29 and $19)	(97)	(113)	(188)
Supplemental noncash information of investing activities:
Sale of property, plant and equipment in exchange for receivable	0	0	56
Supplemental noncash information of financing activities:
Dividend to parent in exchange for advances to affiliates	(1,980)	0	0
Cash, cash equivalents and restricted cash:
Cash and cash equivalents	10	8	2
Restricted cash - noncurrent	2	2	2
Total	$ 12	$ 10	$ 4