CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
OPERATING ACTIVITIES
Net income	$ 1,312	$ 1,441
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	985	1,017
Deferred income taxes	(30)	(96)
Provision for uncollectible accounts	45	36
Accrued interest on affiliate note	61	61
Net loss on early retirement of debt	36	0
Changes in current assets and liabilities:
Accounts receivable	70	5
Accounts payable	(34)	(14)
Accrued income and other taxes	12	13
Other current assets and liabilities, net	(193)	(88)
Other current assets and liabilities - affiliates, net	(17)	(14)
Changes in other noncurrent assets and liabilities, net	45	6
Changes in affiliate obligations, net	(54)	(67)
Other, net	13	17
Net cash provided by operating activities	2,251	2,317
INVESTING ACTIVITIES
Capital expenditures	(885)	(777)
Changes in advances to affiliates	1,842
Payments for Advance to Affiliate		(456)
Proceeds from sale of property, plant and equipment and other assets	2	24
Net cash provided by (used in) investing activities	959	(1,209)
FINANCING ACTIVITIES
Payments of long-term debt	(1,860)	(10)
Dividends paid	(1,350)	(1,100)
Changes in advances from affiliates	4	0
Net cash used in financing activities	(3,206)	(1,110)
Net increase (decrease) in cash, cash equivalents and restricted cash	4	(2)
Cash, cash equivalents and restricted cash at beginning of period	4	7
Cash, cash equivalents and restricted cash at end of period	8	5
Supplemental cash flow information:
Income taxes paid, net	(473)	(584)
Interest paid (net of capitalized interest of $24 and $19)	(232)	(281)
Cash, cash equivalents and restricted cash:
Total	$ 8	$ 5