Consolidated Statements of Cash Flows (Unaudited) - NPC - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net income (loss)	$ 2,064	$ 2,768
Adjustments to reconcile net income to net cash flows from operating activities:
Allowance for equity funds	(110)	(80)
Deferred income taxes and investment tax credits, net	(117)	385
Net power cost deferrals	(446)	(288)
Amortization of net power cost deferrals	279	119
Other, net	(93)	37
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(60)	(156)
Accrued property, income and other taxes, net	530	489
Accounts payable and other liabilities	52	457
Net cash flows from operating activities	3,665	5,147
Cash flows from investing activities:
Capital expenditures	(4,025)	(3,382)
Net cash flows from investing activities	(3,674)	(3,452)
Cash flows from financing activities:
Net proceeds from (repayments of) short-term debt	1,118	(54)
Other, net	(36)	(248)
Net cash flows from financing activities	625	(605)
Net change in cash and cash equivalents and restricted cash and cash equivalents	623	1,057
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	1,817	1,244
Cash and cash equivalents and restricted cash and cash equivalents at end of period	2,440	2,301
NPC
Cash flows from operating activities:
Net income (loss)	70	74
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	214	206
Allowance for equity funds	(8)	(5)
Other changes in regulatory assets and liabilities	(19)	(14)
Deferred income taxes and investment tax credits, net	9	12
Net power cost deferrals	(252)	(159)
Amortization of net power cost deferrals	131	46
Other, net	(1)	10
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(83)	(154)
Inventories	(27)	(4)
Accrued property, income and other taxes, net	(4)	18
Accounts payable and other liabilities	202	194
Net cash flows from operating activities	232	224
Cash flows from investing activities:
Capital expenditures	(719)	(350)
Proceeds from repayment of affiliate note receivable	100	0
Net cash flows from investing activities	(619)	(350)
Cash flows from financing activities:
Net (repayments of) proceeds from long-term debt	(1)	300
Net proceeds from (repayments of) short-term debt	0	(180)
Contributions from parent	400	25
Other, net	(10)	(9)
Net cash flows from financing activities	389	136
Net change in cash and cash equivalents and restricted cash and cash equivalents	2	10
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	60	45
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 62	$ 55