Consolidated Statements of Cash Flows - PAC - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income attributable to parent	$ 5,790	$ 6,943	$ 2,950
Adjustments to reconcile net income to net cash flows from operating activities:
Allowance for equity funds	(126)	(165)	(173)
Changes in regulatory assets and liabilities	(668)	(415)	153
Deferred income taxes and investment tax credits, net	646	1,880	290
Other, net	(169)	(77)	23
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	553	(1,318)	(372)
Derivative collateral, net	82	43	(25)
Accrued property, income and other taxes, net	(489)	(134)	(16)
Accounts payable and other liabilities	163	501	(26)
Net cash flows from operating activities	8,692	6,224	6,206
Cash flows from investing activities:
Capital expenditures	(6,611)	(6,765)	(7,364)
Other, net	(74)	76	51
Net cash flows from investing activities	(5,763)	(13,165)	(8,963)
Cash flows from financing activities:
Net (repayments of) proceeds from short-term debt	(276)	(939)	684
Other, net	(79)	(134)	(37)
Net cash flows from financing activities	(3,131)	7,103	3,124
Net change in cash and cash equivalents and restricted cash and cash equivalents	(201)	177	385
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	1,445	1,268	883
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,244	1,445	1,268
PAC
Cash flows from operating activities:
Net income attributable to parent	888	739	771
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	1,088	1,209	954
Allowance for equity funds	(50)	(98)	(72)
Changes in regulatory assets and liabilities	(189)	(229)	(55)
Deferred income taxes and investment tax credits, net	64	(124)	(131)
Other, net	(5)	1	20
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	15	(154)	26
Inventories	8	(88)	23
Prepaid expenses	2	(15)	(12)
Derivative collateral, net	19	23	12
Accrued property, income and other taxes, net	(37)	(53)	22
Accounts payable and other liabilities	1	372	(11)
Net cash flows from operating activities	1,804	1,583	1,547
Cash flows from investing activities:
Capital expenditures	(1,513)	(2,540)	(2,175)
Other, net	12	30	11
Net cash flows from investing activities	(1,501)	(2,510)	(2,164)
Cash flows from financing activities:
Proceeds from long-term debt	984	987	989
Repayments of long-term debt	(870)	(38)	(350)
Net (repayments of) proceeds from short-term debt	(93)	(37)	100
Dividends paid	(150)	0	(175)
Other, net	(7)	(2)	(3)
Net cash flows from financing activities	(136)	910	561
Net change in cash and cash equivalents and restricted cash and cash equivalents	167	(17)	(56)
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	19	36	92
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 186	$ 19	$ 36