Condensed Statements of Cash Flows (Unaudited) - APC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Activities:
Net income (loss)	$ 991	$ 1,107
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	989	964
Deferred income taxes	40	140
Pension, postretirement, and other employee benefits	(123)	(78)
Settlement of asset retirement obligations	(87)	(109)
Other, net	7	114
Changes in certain current assets and liabilities —
-Receivables	(217)	308
-Prepayments	(86)	(98)
-Other current assets	87	90
-Accounts payable	132	(216)
-Accrued taxes	(58)	(212)
-Accrued compensation	(470)	(417)
-Retail fuel cost over recovery	0	(53)
-Other current liabilities	35	(63)
Net cash provided from operating activities	1,592	1,242
Investing Activities:
Property additions	(1,419)	(1,678)
Nuclear decommissioning trust fund purchases	(294)	(550)
Nuclear decommissioning trust fund sales	289	546
Cost of removal, net of salvage	(227)	(85)
Change in construction payables, net	23	(116)
Other investing activities	110	45
Net cash used for investing activities	(1,555)	(2,243)
Redemptions and repurchases —
Payment of common stock dividends	(702)	(678)
Other financing activities	(115)	(117)
Net cash provided from (used for) financing activities	(193)	1,734
Net Change in Cash, Cash Equivalents, and Restricted Cash	(156)	733
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	1,829	1,068
Cash, Cash Equivalents, and Restricted Cash at End of Period	1,673	1,801
Supplemental Cash Flow Information:
Interest, net of amounts capitalized	515	519
Noncash transactions —
Accrued property additions at year-end	863	872
Right-of-use assets obtained under leases	3	76
Alabama Power
Operating Activities:
Net income (loss)	351	363
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	250	248
Deferred income taxes	35	33
Pension, postretirement, and other employee benefits	(48)	(29)
Settlement of asset retirement obligations	(38)	(49)
Retail fuel cost under recovery – long-term	(46)	0
Other, net	(27)	(14)
Changes in certain current assets and liabilities —
-Receivables	(4)	40
-Fossil fuel stock	23	38
-Prepayments	(85)	(73)
-Other current assets	(10)	(16)
-Accounts payable	(237)	(299)
-Accrued taxes	102	104
-Accrued compensation	(99)	(105)
-Retail fuel cost over recovery	0	(18)
-Other current liabilities	(13)	(9)
Net cash provided from operating activities	154	214
Investing Activities:
Property additions	(343)	(466)
Nuclear decommissioning trust fund purchases	(72)	(310)
Nuclear decommissioning trust fund sales	72	310
Cost of removal, net of salvage	(60)	(23)
Change in construction payables, net	39	32
Other investing activities	(1)	(9)
Net cash used for investing activities	(365)	(466)
Proceeds —
Senior notes	700	0
Redemptions and repurchases —
Senior notes	(550)	0
Capital contributions from parent company	625	600
Payment of common stock dividends	(254)	(246)
Other financing activities	(17)	(13)
Net cash provided from (used for) financing activities	504	341
Net Change in Cash, Cash Equivalents, and Restricted Cash	293	89
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	1,060	530
Cash, Cash Equivalents, and Restricted Cash at End of Period	1,353	619
Supplemental Cash Flow Information:
Interest, net of amounts capitalized	110	93
Noncash transactions —
Accrued property additions at year-end	188	198
Right-of-use assets obtained under leases	$ 1	$ 1