CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
OPERATING ACTIVITIES
Net Income	$ 3,090.8	$ 2,309.9
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	2,566.1	2,461.7
Deferred Income Taxes	123.6	89.5
Asset Impairments and Other Related Charges	0.0	142.5
Allowance for Equity Funds Used During Construction	(172.9)	(153.0)
Mark-to-Market of Risk Management Contracts	(192.6)	(97.6)
Pension Contributions to Qualified Plan Trust	(94.7)	0.0
Property Taxes	541.3	508.3
Deferred Fuel Over/Under-Recovery, Net	164.7	304.6
Change in Other Noncurrent Assets	(719.7)	(244.0)
Change in Other Noncurrent Liabilities	133.8	193.8
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(212.4)	(131.8)
Fuel, Materials and Supplies	150.7	188.5
Accounts Payable	327.3	14.2
Accrued Taxes, Net	(687.2)	(532.3)
Other Current Assets	37.7	(139.2)
Other Current Liabilities	74.3	161.8
Net Cash Flows from Operating Activities	5,130.8	5,076.9
INVESTING ACTIVITIES
Construction Expenditures	(6,001.2)	(5,168.6)
Purchases of Investment Securities	(2,407.0)	(2,398.0)
Sales of Investment Securities	2,349.2	2,343.5
Acquisitions of Generation Facilities	(1,657.3)	0.0
Acquisitions of Nuclear Fuel	(88.9)	(98.4)
Proceeds from Sales of Assets	12.6	365.0
Proceeds from Sale of Equity Method Investment	0.0	114.0
Other Investing Activities	43.5	73.0
Net Cash Flows Used for Investing Activities	(7,749.1)	(4,769.5)
FINANCING ACTIVITIES
Capital Contribution from Noncontrolling Interest	33.9	0.0
Issuance of Common Stock	187.5	513.0
Issuance of Long-term Debt	6,249.2	3,748.5
Issuance of Short-term Debt with Original Maturities greater than 90 Days	319.9	376.6
Change in Short-term Debt with Original Maturities less than 90 Days, Net	(1,008.2)	(676.1)
Retirement of Long-term Debt	(2,803.8)	(1,969.1)
Redemption of Short-term Debt with Original Maturities Greater than 90 Days	(677.8)	(871.1)
Principal Payments for Finance Lease Obligations	(37.9)	(51.2)
Proceeds from the Midwest Transmission Holdings Noncontrolling Interest Transaction, Net of Transaction Costs	2,782.9	0.0
Dividends Paid on Common Stock	(1,497.9)	(1,402.7)
Dividends Paid to Noncontrolling Interest	(71.5)	(4.7)
Other Financing Activities	2.8	(50.4)
Net Cash Flows from (Used for) Financing Activities	3,479.1	(387.2)
Net Increase in Cash and Cash Equivalents	860.8	(79.8)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	246.0	379.0
Cash, Cash Equivalents and Restricted Cash at End of Period	$ 1,106.8	$ 299.2