CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating activities
Net income	$ 94,629	$ 6,924	[1]
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	147,310	119,459
Nuclear fuel amortization	25,750	28,465
Deferred income taxes	47,018	9,565
Amortization of Investment Tax Credits	(420)	(433)
Allowance for equity funds used during construction	(5,648)	(5,930)
Loss on Monticello life cycle management/extended power uprate project	0	124,226
Net realized and unrealized hedging and derivative transactions	1,890	6,385
Changes in operating assets and liabilities:
Accounts receivable	(45,382)	10,584
Accrued unbilled revenues	40,322	57,484
Inventories	35,378	27,059
Other current assets	(14,146)	14,042
Accounts payable	(4,057)	(8,405)
Net regulatory assets and liabilities	51,517	37,558
Other current liabilities	(12,118)	42,288
Pension and other employee benefit obligations	(48,074)	(32,330)
Change in other noncurrent assets	(43)	(115)
Change in other noncurrent liabilities	(1,112)	(21,480)
Net cash provided by operating activities	312,814	415,346
Investing activities
Utility capital/construction expenditures	(259,570)	(322,660)
Allowance for equity funds used during construction	5,648	5,930
Proceeds from insurance recoveries	0	24,241
Purchases of investments in external decommissioning fund	(109,373)	(387,826)
Proceeds from the sale of investments in external decommissioning fund	104,280	386,111
Investments in utility money pool arrangement	0	(15,000)
Repayments from utility money pool arrangement	0	15,000
Other, net	(2,084)	(2,244)
Net cash used in investing activities	(261,099)	(296,448)
Financing activities
Repayments of short-term borrowings, net	(150,000)	(66,000)
Borrowings under utility money pool arrangement	310,000	31,000
Repayments under utility money pool arrangement	(217,000)	(31,000)
Repayments of Long-term Debt	0	(33)
Capital contributions from parent	89,874	75,835
Dividends paid to parent	(73,498)	(77,802)
Net cash used in financing activities	(40,624)	(68,000)
Net change in cash and cash equivalents	11,091	50,898
Cash and cash equivalents at beginning of period	42,605	40,597
Cash and cash equivalents at end of period	53,696	91,495
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(69,643)	(64,798)
Cash (paid) received for income taxes, net	(7,558)	23,769
Supplemental disclosure of non-cash investing transactions:
Property, plant and equipment additions in accounts payable	$ 56,605	$ 108,900

[1] Includes a net of tax charge related to the Monticello LCM/EPU project. See Note 5.