CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
OPERATING ACTIVITIES
Net income	$ 1,573	$ 1,312
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	780	985
Deferred income taxes	(24)	(30)
Provision for uncollectible accounts	18	45
Accrued interest on affiliate note	57	61
Net loss on early retirement of debt	8	36
Changes in current assets and liabilities:
Accounts receivable	7	70
Accounts payable	(19)	(34)
Accrued income and other taxes	17	12
Other current assets and liabilities, net	(113)	(193)
Changes in other noncurrent assets and liabilities, net	10	45
Changes in affiliate obligations, net	(23)	(54)
Other, net	8	(4)
Net cash provided by operating activities	2,299	2,251
INVESTING ACTIVITIES
Capital expenditures	(557)	(885)
Payments for advances to affiliates	(368)
Proceeds from collection of advances to affiliates		1,842
Proceeds from sale of property, plant and equipment and other assets	31	2
Net cash (used in) provided by investing activities	(894)	959
FINANCING ACTIVITIES
Payments of long-term debt	(235)	(1,860)
Dividends paid	(570)	(1,350)
Changes in advances from affiliates	(592)	4
Net cash used in financing activities	(1,397)	(3,206)
Net increase in cash, cash equivalents and restricted cash	8	4
Cash, cash equivalents and restricted cash at beginning of period	15	4
Cash, cash equivalents and restricted cash at end of period	23	8
Supplemental cash flow information:
Income taxes paid, net	(557)	(473)
Interest paid (net of capitalized interest of $14 and $24)	(129)	(232)
Sale of property, plant and equipment in exchange for receivable	56	0
Cash, cash equivalents and restricted cash:
Cash and cash equivalents	2	6
Restricted cash - noncurrent	21	2
Total	$ 23	$ 8