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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |
Net income | $ 619.0 | $ 338.2 | $ 271.3
Adjustments to reconcile net income to net cash provided from operating activities: |  |  |
Depreciation and amortization | 283.5 | 322.6 | 307.9
Deferred income taxes and investment tax credits, net | (50.0) | 153.8 | 102.6
Equity in earnings of unconsolidated affiliates | (131.2) | (101.8) | (15.5)
Distributions from unconsolidated affiliates | 131.2 | 102.3 | 94.1
Allowance for equity funds used during construction | (39.7) | (14.2) | (8.3)
Stock-based compensation | 9.1 | 4.7 | 7.6
Regulatory assets | 3.7 | (21.4) | (9.1)
Regulatory liabilities | (3.7) | (11.8) | (27.5)
Other assets | (0.7) | 15.4 | 10.4
Other liabilities | (65.5) | (18.9) | 8.6
Change in certain current assets and liabilities: |  |  |
Accounts receivable and accrued unbilled revenues, net | (21.8) | (6.9) | 21.6
Income taxes receivable | 13.6 | (2.2) | (1.2)
Fuel, materials and supplies inventories | (3.6) | 32.4 | (56.5)
Fuel recoveries | 53.0 | (112.6) | 129.6
Other current assets | 27.2 | (26.2) | (17.2)
Accounts payable | 27.1 | (45.1) | 30.9
Other current liabilities | (66.7) | 36.4 | 17.8
Net cash provided from operating activities | 784.5 | 644.7 | 867.1
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |
Capital expenditures (less allowance for equity funds used during construction) | (824.1) | (660.1) | (547.8)
Return of capital - equity method investments | 10.0 | 38.8 | 45.2
Proceeds from sale of assets | 0.7 | 0.9 | 2.5
Investment in unconsolidated affiliates | (8.5) | 0.0 | 0.0
Net cash used in investing activities | (821.9) | (620.4) | (500.1)
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |
Proceeds from long-term debt | 592.1 | 0.0 | 0.0
Issuance (expense) of common stock | (0.1) | 0.0 | 7.2
Dividends paid on common stock | (247.6) | (225.1) | (204.6)
Other | 0.0 | (0.1) | (1.7)
Payment of long-term debt | (225.1) | (110.2) | (0.2)
(Decrease) increase in short-term debt | (67.8) | 236.2 | (98.0)
Net cash provided from (used in) financing activities | 51.5 | (99.2) | (297.3)
NET CHANGE IN CASH AND CASH EQUIVALENTS | 14.1 | (74.9) | 69.7
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD | 0.3 | 75.2 | 5.5
CASH AND CASH EQUIVALENTS AT END OF PERIOD | $ 14.4 | $ 0.3 | $ 75.2

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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration