Condensed Statements Of Consolidated Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows - operating activities:
Net income	$ 194,000	$ 168,000
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization, including regulatory amortization	242,000	226,000
Provision in lieu of deferred income taxes - net	13,000	23,000
Changes in operating assets and liabilities:
Regulatory accounts related to reconcilable tariffs (Note 2)	17,000
Other operating assets and liabilities	(193,000)	(183,000)
Cash provided by operating activities	273,000	234,000
Cash flows - financing activities:
Issuances of long-term debt (Note 5)	1,185,000	470,000
Repayments of long-term debt (Note 5)	(400,000)
Net change in short-term borrowings (Note 4)	(215,000)	(70,000)
Capital contributions from members (Note 7)	106,000	63,000
Distributions to members (Note 7)	(106,000)	(96,000)
Cash provided by financing activities	570,000	367,000
Cash flows - investing activities:
Capital expenditures	(704,000)	(627,000)
Expenditures for third party in joint project		(42,000)
Reimbursement from third party in joint project		42,000
Other - net	12,000	10,000
Cash used in investing activities	(692,000)	(617,000)
Net change in cash, cash equivalents and restricted cash	151,000	(16,000)
Cash, cash equivalents and restricted cash - beginning balance	54,000	27,000
Cash, cash equivalents and restricted cash - ending balance	$ 205,000	$ 11,000