CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating Activities
Net income	$ 92.5	$ 70.0
Reconciliation to cash provided by operating activities
Depreciation and amortization	69.5	68.8
Deferred income taxes and investment tax credits, net	15.7	18.2
Contributions and payments related to pension and OPEB plans	(0.4)	(66.2)
Cash received for pension plan assets transferred	0.0	161.9
Change in –
Accounts receivable and unbilled revenues	5.6	10.6
Materials, supplies, and inventories	(1.5)	13.3
Prepaid taxes	13.9	10.9
Other current assets	7.7	(2.5)
Accounts payable	50.0	(14.6)
Other current liabilities	1.0	0.3
Other, net	(1.6)	9.7
Net cash provided by operating activities	252.4	280.4
Investing Activities
Capital expenditures	(193.4)	(144.3)
Acquisition of Forward Wind Energy Center	(77.1)	0.0
Payments for assets transferred from WBS	(23.7)	(9.2)
Other, net	1.6	1.4
Net cash used in investing activities	(292.6)	(152.1)
Financing Activities
Change in short-term debt	24.1	(44.8)
Payment of dividends to parent	(60.0)	(135.0)
Equity contribution from parent	70.0	75.0
Net cash provided by (used in) financing activities	34.1	(104.8)
Net change in cash and cash equivalents	(6.1)	23.5
Cash and cash equivalents at beginning of period	7.9	3.1
Cash and cash equivalents at end of period	$ 1.8	$ 26.6