CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
OPERATING ACTIVITIES
Net income	$ 852	$ 1,020
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	400	423
Deferred income taxes	(17)	(3)
Provision for uncollectible accounts	28	16
Accrued interest on affiliate note	0	28
Changes in current assets and liabilities:
Accounts receivable	(70)	(12)
Accounts payable	31	(16)
Accrued income and other taxes	3	(3)
Other current assets and liabilities, net	(48)	(65)
Changes in other noncurrent assets and liabilities, net	33	(9)
Changes in affiliate obligations, net	(30)	(26)
Other, net	4	5
Net cash provided by operating activities	1,186	1,358
INVESTING ACTIVITIES
Capital expenditures	(459)	(350)
Changes in advances to affiliates	(730)	(993)
Proceeds from sale of property, plant and equipment and other assets	2	42
Net cash used in investing activities	(1,187)	(1,301)
FINANCING ACTIVITIES
Payments of long-term debt	(2)	0
Changes in advances from affiliates	0	(55)
Net cash used in financing activities	(2)	(55)
Net (decrease) increase in cash, cash equivalents and restricted cash	(3)	2
Cash, cash equivalents and restricted cash at beginning of period	10	4
Cash, cash equivalents and restricted cash at end of period	7	6
Supplemental cash flow information:
Income taxes paid, net	(302)	(343)
Interest paid, including affiliate interest (net of capitalized interest of $22 and $13)	(53)	(56)
Cash, cash equivalents and restricted cash:
Cash and cash equivalents	5	5
Restricted cash - noncurrent	2	1
Total	$ 7	$ 6