CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating activities
Net income	$ 224.4	$ 209.1
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	410.8	398.1
Nuclear fuel amortization	64.7	58.1
Deferred income taxes	(39.1)	(5.8)
Amortization of investment tax credits	(0.8)	(0.7)
Allowance for equity funds used during construction	(14.1)	(10.6)
Provision for bad debts	8.9	5.0
Net realized and unrealized hedging and derivative transactions	8.7	6.5
Changes in operating assets and liabilities:
Accounts receivable	4.9	50.9
Accrued unbilled revenues	25.8	37.8
Inventories	8.7	17.5
Other current assets	(6.2)	(23.7)
Accounts payable	(18.5)	(32.0)
Net regulatory assets and liabilities	(8.6)	(100.4)
Other current liabilities	(91.5)	(76.6)
Pension and other employee benefit obligations	(47.3)	(46.7)
Other, net	6.5	(12.5)
Net cash provided by operating activities	537.3	474.0
Investing activities
Utility capital/construction expenditures	(541.1)	(522.7)
Purchases of investment securities	(1,159.8)	(488.1)
Proceeds from the sale of investment securities	1,149.6	477.9
Investments in utility money pool arrangement	(560.0)	(219.0)
Repayments from utility money pool arrangement	560.0	219.0
Other, net	0.2	(0.4)
Net cash used in investing activities	(551.1)	(533.3)
Financing activities
(Repayments of) proceeds from short-term borrowings, net	(30.0)	44.0
Borrowings under utility money pool arrangement	118.0	99.0
Repayments under utility money pool arrangement	(118.0)	(49.0)
Proceeds from issuance of long-term debt	678.2	0.0
Capital contributions from parent	214.1	134.9
Dividends paid to parent	(193.9)	(177.4)
Proceeds from (Payments for) Other Financing Activities	3.4	0.0
Net cash provided by financing activities	671.8	51.5
Net change in cash, cash equivalents and restricted cash	658.0	(7.8)
Cash, cash equivalents and restricted cash at beginning of period	126.3	50.0
Cash, cash equivalents and restricted cash at end of period	784.3	42.2
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(110.7)	(105.5)
Cash paid for income taxes, net	(22.9)	(42.6)
Supplemental disclosure of non-cash investing and financing transactions:
Accrued property, plant and equipment additions	298.1	107.8
Inventory transfers to plant, property and equipment	10.4	9.6
Operating lease right-of-use assets	0.0	628.5
Allowance for equity funds used during construction	$ 14.1	$ 10.6