| In millions, except per share items | Mar-31-19 | Dec-31-18 | Sep-30-18 | Jun-30-18 | Mar-31-18 | Dec-31-17 | Sep-30-17 | Jun-30-17 |
| | 10-Q | 10-K | 10-Q/A | 10-Q | 10-Q | 10-K | 10-Q/A | 10-Q |
| Cash flows from operating activities | | | | | | | | |
| Net income | | | | | | | 53.4 | 72.5 |
| |
| Adjustments to reconcile net income to net cash from operating activities: | | | | | | | | |
| Depreciation | | | | | | | 12.4 | 49.9 |
| Amortization of deferred financing costs | | | | | | | 1.0 | 4.0 |
| Equity based compensation | | | | | | | 0.2 | 0.7 |
| Changes in assets and liabilities: | | | | | | | | |
| Due from affiliates | | | | | | | -6.6 | -2.7 |
| Inventory | | | | | | | -0.9 | -0.5 |
| Prepaids and other current assets | | | | | | | 0.0 | 0.0 |
| Accounts payable and accrued liabilities | | | | | | | -3.4 | -3.4 |
| Net cash provided by operating activities | | | | | | | 91.2 | 118.7 |
| |
| Cash flows from investing activities | | | | | | | | |
| Additions to electric plant | | | | | | | -51.5 | -202.3 |
| Net cash used in investing activities | | | | | | | -55.3 | -202.3 |
| |
| Cash flows from financing activities | | | | | | | | |
| Proceeds from short-term borrowings | | | | | | | 45.0 | 154.5 |
| Repayments of short-term borrowings | | | | | | | -10.0 | -203.0 |
| Repayments of long-term debt | | | | | | | -1.9 | -7.6 |
| Dividends and distributions paid | | | | | | | -15.2 | -60.6 |
| Net cash used in financing activities | | | | | | | -4.8 | 82.4 |