CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - I&M - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	$ 833.4	$ 787.1
Deferred Income Taxes	165.2	(113.3)
Allowance for Equity Funds Used During Construction	(57.3)	(43.6)
Mark-to-Market of Risk Management Contracts	(14.8)	40.9
Deferred Fuel Over/Under-Recovery, Net	(74.5)	43.4
Change in Other Noncurrent Assets	(130.9)	(74.5)
Change in Other Noncurrent Liabilities	141.5	61.8
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(1.5)	34.9
Fuel, Materials and Supplies	138.6	104.3
Accounts Payable	6.2	(99.5)
Accrued Taxes, Net	(153.4)	(57.7)
Other Current Assets	(23.6)	(91.3)
Other Current Liabilities	(92.7)	(66.8)
Net Cash Flows from Operating Activities	1,450.0	1,442.2
INVESTING ACTIVITIES
Construction Expenditures	(2,100.2)	(1,761.7)
Purchases of Investment Securities	(602.7)	(590.0)
Sales of Investment Securities	586.5	572.5
Acquisitions of Nuclear Fuel	(35.8)	(33.7)
Other Investing Activities	50.2	29.6
Net Cash Flows Used for Investing Activities	(2,102.0)	(1,669.3)
FINANCING ACTIVITIES
Retirement of Long-term Debt	(229.1)	(1,162.2)
Principal Payments for Finance Lease Obligations	(12.5)	(17.0)
Dividends Paid on Common Stock	(501.0)	(466.9)
Other Financing Activities	(18.7)	(31.9)
Net Cash Flows from Financing Activities	698.0	129.9
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	46.0	(97.2)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	246.0	379.0
Cash, Cash Equivalents and Restricted Cash at End of Period	292.0	281.8
SUPPLEMENTARY INFORMATION
Cash Paid for Interest, Net of Capitalized Amounts	350.2	368.3
Net Cash Paid for Income Taxes	7.1	16.1
Noncash Acquisitions Under Finance Leases	7.9	7.0
Construction Expenditures Included in Current Liabilities as of March 31,	1,040.9	837.0
I&M
OPERATING ACTIVITIES
Net Income (Loss)	57.5	145.0
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	124.0	108.3
Deferred Income Taxes	(12.6)	(60.3)
Deferral of Incremental Nuclear Refueling Outage Expenses, Net	(14.4)	(11.8)
Allowance for Equity Funds Used During Construction	(4.4)	(3.3)
Mark-to-Market of Risk Management Contracts	17.0	27.1
Amortization of Nuclear Fuel	26.4	24.4
Deferred Fuel Over/Under-Recovery, Net	7.5	10.1
Change in Other Noncurrent Assets	(19.7)	(34.0)
Change in Other Noncurrent Liabilities	65.2	35.3
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	5.0	(2.1)
Fuel, Materials and Supplies	20.9	21.3
Accounts Payable	38.8	(13.5)
Accrued Taxes, Net	23.0	28.8
Other Current Assets	6.6	11.9
Other Current Liabilities	(16.2)	(37.3)
Net Cash Flows from Operating Activities	324.6	249.9
INVESTING ACTIVITIES
Construction Expenditures	(158.6)	(142.3)
Purchases of Investment Securities	(601.2)	(588.5)
Sales of Investment Securities	576.5	569.5
Acquisitions of Nuclear Fuel	(35.8)	(33.7)
Other Investing Activities	17.8	2.7
Net Cash Flows Used for Investing Activities	(201.3)	(192.3)
FINANCING ACTIVITIES
Change in Advances from Affiliates, Net	(43.1)	9.9
Retirement of Long-term Debt	(26.5)	(25.4)
Principal Payments for Finance Lease Obligations	(1.6)	(1.6)
Dividends Paid on Common Stock	(50.0)	(37.5)
Other Financing Activities	0.3	0.4
Net Cash Flows from Financing Activities	(120.9)	(54.2)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	2.4	3.4
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	1.5	2.1
Cash, Cash Equivalents and Restricted Cash at End of Period	3.9	5.5
SUPPLEMENTARY INFORMATION
Cash Paid for Interest, Net of Capitalized Amounts	37.5	38.7
Net Cash Paid for Income Taxes	5.4	0.0
Noncash Acquisitions Under Finance Leases	0.6	0.5
Construction Expenditures Included in Current Liabilities as of March 31,	$ 62.0	$ 63.1