CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - I&M - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	$ 907	$ 833
Deferred Income Taxes	188	165
Allowance for Equity Funds Used During Construction	(70)	(57)
Mark-to-Market of Risk Management Contracts	100	(15)
Deferred Fuel Over/Under-Recovery, Net	(122)	(75)
Change in Other Noncurrent Assets	(351)	(131)
Change in Other Noncurrent Liabilities	433	142
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(36)	(2)
Fuel, Materials and Supplies	(39)	139
Accounts Payable	108	6
Accrued Taxes, Net	(244)	(153)
Other Current Assets	(115)	(23)
Other Current Liabilities	(66)	(93)
Net Cash Flows from Operating Activities	1,519	1,450
INVESTING ACTIVITIES
Construction Expenditures	(2,830)	(2,100)
Purchases of Investment Securities	(575)	(603)
Sales of Investment Securities	555	587
Acquisitions of Generation Facilities	(965)	0
Acquisitions of Nuclear Fuel	(13)	(36)
Other Investing Activities	(1)	(5)
Net Cash Flows Used for Investing Activities	(3,569)	(2,102)
FINANCING ACTIVITIES
Issuance of Long-term Debt	2,906	562
Retirement of Long-term Debt	(678)	(229)
Principal Payments for Finance Lease Obligations	(24)	(13)
Dividends Paid on Common Stock	(520)	(500)
Net Cash Flows from (Used for) Financing Activities	2,121	698
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	71	46
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	268	246
Cash, Cash Equivalents and Restricted Cash at End of Period	339	292
SUPPLEMENTARY INFORMATION
Cash Paid for Interest, Net of Capitalized Amounts	450	350
Noncash Acquisitions Under Finance Leases	24	8
Construction Expenditures Included in Current Liabilities as of March 31,	1,434	1,041
Acquisition of Nuclear Fuel Included in Current Liabilities as of March 31,	9	0
INDIANA MICHIGAN POWER COMPANY
OPERATING ACTIVITIES
Net Income	148	58
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	131	124
Deferred Income Taxes	0	(13)
Amortization (Deferral) of Incremental Nuclear Refueling Outage Expenses, Net	19	(14)
Allowance for Equity Funds Used During Construction	(6)	(4)
Mark-to-Market of Risk Management Contracts	7	17
Amortization of Nuclear Fuel	32	26
Deferred Fuel Over/Under-Recovery, Net	30	8
Change in Other Noncurrent Assets	(15)	(20)
Change in Other Noncurrent Liabilities	79	65
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(60)	5
Fuel, Materials and Supplies	2	21
Accounts Payable	(7)	39
Accrued Taxes, Net	12	23
Other Current Assets	(1)	7
Other Current Liabilities	(11)	(17)
Net Cash Flows from Operating Activities	360	325
INVESTING ACTIVITIES
Construction Expenditures	(167)	(159)
Change in Advances to Affiliates, Net	192	0
Purchases of Investment Securities	(573)	(601)
Sales of Investment Securities	548	577
Acquisitions of Generation Facilities	(965)	0
Acquisitions of Nuclear Fuel	(13)	(36)
Other Investing Activities	1	18
Net Cash Flows Used for Investing Activities	(977)	(201)
FINANCING ACTIVITIES
Issuance of Long-term Debt	640	0
Change in Advances from Affiliates, Net	9	(43)
Retirement of Long-term Debt	(31)	(27)
Principal Payments for Finance Lease Obligations	(1)	(2)
Dividends Paid on Common Stock	0	(50)
Net Cash Flows from (Used for) Financing Activities	617	(122)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	0	2
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	2	2
Cash, Cash Equivalents and Restricted Cash at End of Period	2	4
SUPPLEMENTARY INFORMATION
Cash Paid for Interest, Net of Capitalized Amounts	40	38
Noncash Acquisitions Under Finance Leases	1	1
Construction Expenditures Included in Current Liabilities as of March 31,	94	62
Acquisition of Nuclear Fuel Included in Current Liabilities as of March 31,	$ 9	$ 0