STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities
Net income	$ 231.1	$ 221.6	$ 184.7
Reconciliation to cash provided by operating activities
Depreciation and amortization	188.6	174.3	166.2
Deferred income taxes and ITCs, net	84.6	40.4	125.2
Change in –
Accounts receivable and unbilled revenues, net	(24.5)	32.2	(8.1)
Materials, supplies, and inventories	(20.2)	13.7	(3.4)
Prepaid taxes	(1.0)	24.4	(22.0)
Other current assets	(3.3)	0.2	(4.0)
Accounts payable	3.2	(47.3)	22.3
Other current liabilities	0.9	(0.2)	0.7
Other, net	(21.1)	(5.9)	(40.5)
Net cash provided by operating activities	438.3	453.4	421.1
Investing activities
Capital expenditures	(389.7)	(530.7)	(517.8)
Proceeds from cash surrender value of life insurance	0.0	7.1	6.6
Other, net	(8.0)	(3.4)	(4.7)
Net cash used in investing activities	(397.7)	(527.0)	(515.9)
Financing activities
Retirement of long-term debt	(400.0)	0.0	0.0
Issuance of long-term debt	450.0	0.0	300.0
Change in short-term debt	120.5	119.0	(192.9)
Payment of dividends to parent	(260.0)	(260.0)	(120.0)
Equity contribution from parent	55.0	215.0	105.0
Other, net	(6.4)	0.0	(3.9)
Net cash provided by (used in) financing activities	(40.9)	74.0	88.2
Net change in cash and cash equivalents	(0.3)	0.4	(6.6)
Cash and cash equivalents at beginning of year	2.7	2.3	8.9
Cash and cash equivalents at end of year	$ 2.4	$ 2.7	$ 2.3