CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
OPERATING ACTIVITIES
Net income	$ 528	$ 482
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	210	317
Deferred income taxes	(2)	(7)
Provision for uncollectible accounts	7	7
Accrued interest on affiliate note	28	28
Net loss on early retirement of debt	0	8
Changes in current assets and liabilities:
Accounts receivable	15	17
Accounts payable	(33)	(7)
Accrued income and other taxes	22	30
Other current assets and liabilities, net	(56)	(64)
Changes in other noncurrent assets and liabilities, net	(5)	(14)
Changes in affiliate obligations, net	(29)	5
Other, net	2	12
Net cash provided by operating activities	687	814
INVESTING ACTIVITIES
Capital expenditures	(144)	(219)
Payments for advances to affiliates	(482)
Proceeds from collection of advances to affiliates		0
Proceeds from sale of property, plant and equipment and other assets	1	8
Net cash used in investing activities	(625)	(211)
FINANCING ACTIVITIES
Payments of long-term debt	0	(235)
Dividends paid	0	(300)
Changes in advances from affiliates	(55)	(72)
Net cash used in financing activities	(55)	(607)
Net increase (decrease) in cash, cash equivalents and restricted cash	7	(4)
Cash, cash equivalents and restricted cash at beginning of period	4	15
Cash, cash equivalents and restricted cash at end of period	11	11
Supplemental cash flow information:
Income taxes paid, net	(178)	(172)
Interest paid (net of capitalized interest of $6 and $5)	(31)	(37)
Cash, cash equivalents and restricted cash:
Cash and cash equivalents	9	10
Restricted cash - noncurrent	2	1
Total	$ 11	$ 11