CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Operating activities
Net income	$ 968.5	$ 832.6
Reconciliation to cash provided by operating activities
Depreciation and amortization	728.8	670.0
Deferred income taxes and ITCs, net	220.0	321.5
Contributions and payments related to pension and OPEB plans	(7.1)	(7.5)
Equity income in transmission affiliates, net of distributions	(3.4)	(19.6)
Change in –
Accounts receivable and unbilled revenues, net	136.4	254.2
Materials, supplies, and inventories	110.2	79.4
Other current assets	65.4	49.5
Accounts payable	(172.1)	(90.3)
Customer credit balances	(38.4)	(57.4)
Other current liabilities	(6.4)	(53.1)
Other, net	14.0	(78.3)
Net cash provided by operating activities	2,015.9	1,901.0
Investing activities
Capital expenditures	(1,530.5)	(1,138.4)
Acquisition of Hardin III, net of cash acquired of $0.2	(406.1)	0.0
Acquisition of West Riverside	0.0	(98.2)
Capital contributions to transmission affiliates	(87.8)	(30.3)
Proceeds from the sale of investments held in rabbi trust	16.9	14.8
Reimbursement for ATC's transmission infrastructure upgrades	39.7	6.2
Other, net	(5.0)	(4.9)
Net cash used in investing activities	(1,972.8)	(1,250.8)
Financing activities
Exercise of stock options	24.7	4.7
Issuance of common stock, net	398.8	38.2
Purchase of common stock	(1.3)	(3.2)
Dividends paid on common stock	(568.7)	(527.2)
Issuance of long-term debt	1,025.0	2,074.2
Retirement of long-term debt	(567.6)	(785.4)
Change in commercial paper	(308.0)	(1,260.4)
Purchase of additional ownership interest in Samson I from noncontrolling interest	0.0	(28.1)
Payments for debt extinguishment and issuance costs	(16.7)	(23.6)
Other, net	(2.3)	(1.7)
Net cash used in financing activities	(16.1)	(512.5)
Net change in cash, cash equivalents, and restricted cash	27.0	137.7
Cash, cash equivalents, and restricted cash at beginning of period	42.2	165.2
Cash, cash equivalents, and restricted cash at end of period	$ 69.2	$ 302.9