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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Operating Activities |  |
Net income | $ 356.9 | $ 346.5
Reconciliation to cash provided by operating activities |  |
Depreciation and amortization | 194.6 | 191.9
Deferred income taxes and investment tax credits, net | 150.2 | 214.6
Contributions and payments related to pension and OPEB plans | (106.0) | (15.1)
Equity income in transmission affiliate, net of distributions | (6.7) | (23.4)
Change in - |  |
Accounts receivable and unbilled revenues | 55.0 | (48.6)
Materials, supplies, and inventories | 170.5 | 217.2
Other current assets | 41.2 | (63.7)
Accounts payable | (212.7) | (123.7)
Other current liabilities | 90.8 | 56.7
Other, net | (19.2) | (56.5)
Net cash provided by operating activities | 714.6 | 695.9
Investing Activities |  |
Capital expenditures | (329.7) | (312.0)
Capital contributions to transmission affiliate | (27.6) | (9.0)
Proceeds from the sale of assets and businesses | 13.1 | 106.5
Withdrawal of restricted cash from Rabbi trust for qualifying payments | 16.1 | 21.0
Other, net | 2.5 | 5.1
Net cash used in investing activities | (325.6) | (188.4)
Financing Activities |  |
Exercise of stock options | 5.9 | 21.4
Purchase of common stock | (20.2) | (59.6)
Dividends paid on common stock | (164.1) | (156.2)
Retirement of long-term debt | (12.0) | (139.4)
Change in short-term debt | (189.8) | (198.6)
Other, net | (0.6) | 9.8
Net cash used in financing activities | (380.8) | (522.6)
Net change in cash and cash equivalents | 8.2 | (15.1)
Cash and cash equivalents at beginning of period | 37.5 | 49.8
Cash and cash equivalents at end of period | $ 45.7 | $ 34.7

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