Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Activities
Net Income	$ 394	$ 397
Adjustments to reconcile Net Income to Net cash from operating activities:
Depreciation and amortization	358	368
Nuclear fuel amortization	3	15
Allowance for equity funds used during construction	(8)	(7)
Deferred income taxes	18	41
Equity (earnings) losses of equity method investees	11	(32)
Dividends from equity method investees	1	42
Asset (gains) losses and impairments, net	0	1
Changes in assets and liabilities:
Accounts receivable, net	18	107
Inventories	129	52
Prepaid postretirement benefit costs	(27)	(15)
Accounts payable	(42)	(20)
Gas inventory equalization	108	68
Accrued pension liability	(25)	(24)
Accrued postretirement liability	(8)	(3)
Derivative assets and liabilities	108	126
Regulatory assets and liabilities	(154)	128
Other current and noncurrent assets and liabilities	(76)	(187)
Net cash from operating activities	808	1,057
Investing Activities
Plant and equipment expenditures — utility	(737)	(630)
Plant and equipment expenditures — non-utility	(27)	(39)
Proceeds from sale of assets	0	1
Proceeds from sale of nuclear decommissioning trust fund assets	207	271
Investment in nuclear decommissioning trust funds	(209)	(273)
Distributions from equity method investees	2	4
Contributions to equity method investees	(1)	(2)
Notes receivable	(8)	(27)
Other	(9)	(10)
Net cash used for investing activities	(782)	(705)
Financing Activities
Issuance of long-term debt, net of discount and issuance costs	1,119	989
Redemption of long-term debt	(250)	0
Short-term borrowings, net	(514)
Short-term borrowings, net		14
Repurchase of common stock	(55)	(54)
Dividends paid on common stock	(171)	(210)
Contributions from noncontrolling interests	1	12
Distributions to noncontrolling interests	(5)	(14)
Other	(30)	(35)
Net cash from financing activities	95	702
Net Increase in Cash, Cash Equivalents, and Restricted Cash	121	1,054
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	35	516
Cash, Cash Equivalents, and Restricted Cash at End of Period	156	1,570
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	$ 300	$ 208