| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 |
| | 10-Q | 10-Q | 10-K | 8-K | 10-Q | 10-Q | 10-K | 10-Q |
| Cash flows from operating activities: | | | | | | | | |
| Net income | 31.9 | 37.4 | | | 32.2 | 39.5 | 41.7 | 43.6 |
| Adjustments to reconcile net income to net cash from operating activities: | | | | | | | | |
| Depreciation and amortization | 23.7 | 21.1 | | | 13.4 | 10.3 | 11.9 | 10.2 |
| Non-cash lease expense | 2.2 | 2.2 | | | 9.7 | 1.8 | 2.7 | 2.5 |
| Amortization of customer contract intangible assets | 1.8 | 1.8 | | | 1.8 | 1.8 | 1.8 | 1.8 |
| Amortization of deferred revenue | -0.4 | -0.4 | -1.8 | | -0.4 | -0.4 | -0.5 | -0.6 |
| Amortization of deferred financing costs and debt discount | 1.2 | 1.1 | | | 0.9 | 0.8 | 0.8 | 0.8 |
| Income from equity method investments | -7.3 | -6.3 | -31.7 | | -7.1 | -7.0 | -6.6 | -7.3 |
| Dividends from equity method investments | 7.8 | 9.2 | | | 7.1 | 6.6 | 6.0 | 6.5 |
| Other non-cash adjustments | 0.9 | 0.8 | | | 0.6 | 0.5 | | |
| Changes in assets and liabilities: | | | | | | | | |
| Accounts receivable | -5.3 | 2.2 | -9.1 | | 5.3 | -5.0 | 3.0 | -0.4 |
| Inventories and other current assets | -0.2 | -1.5 | | | 0.2 | 0.1 | -0.1 | -0.4 |
| Accounts payable and other current liabilities | -9.8 | -36.4 | | | -16.3 | 14.2 | -14.2 | 12.0 |
| Accounts receivable/payable to related parties | -11.9 | -1.6 | -58.4 | | 41.2 | -14.1 | 19.7 | 7.7 |
| Non-current assets and liabilities, net | -0.1 | -0.3 | -2.8 | | -3.4 | -1.2 | -13.9 | -2.8 |
| Net cash provided by operating activities | 34.6 | 29.2 | | | 85.1 | 47.9 | 52.9 | 74.8 |
| |
| Cash flows from investing activities: | | | | | | | | |
| Purchases of property, plant and equipment | -27.6 | -27.8 | -141.1 | | -24.9 | -10.6 | -10.7 | -3.6 |
| Proceeds from sales of property, plant and equipment | 0.5 | | | | 0.0 | 0.0 | | 0.1 |
| Purchases of intangible assets | -0.8 | -0.6 | -5.6 | | -1.4 | -2.4 | -1.7 | 0.1 |
| Business Combination, net of cash acquired | | | -625.6 | | -621.8 | | | |
| Distributions from equity method investments | | 1.4 | | | 1.2 | 0.6 | 2.5 | 0.8 |
| Net cash used in investing activities | -27.9 | -27.0 | -770.4 | | -646.9 | -12.5 | -8.4 | -2.8 |
| |
| Cash flows from financing activities: | | | | | | | | |
| Distributions to common unitholders - public | -9.5 | -9.4 | -35.9 | | -9.0 | -8.6 | -8.3 | -8.2 |
| Distributions to common unitholders - Delek Holdings | -35.2 | -35.0 | -135.2 | | -33.6 | -33.8 | -33.0 | -32.7 |
| Proceeds from revolving facility | 95.0 | 143.5 | | | 753.9 | 113.6 | 105.0 | 87.7 |
| Payments on revolving facility | -54.6 | -93.4 | -1,289.8 | | -137.1 | -107.5 | -107.9 | -115.6 |
| Deferred financing costs paid | -1.2 | -0.4 | -8.2 | | -0.7 | | | 0.1 |
| Payments on financing lease liabilities | -0.7 | -0.7 | -2.9 | | -0.7 | -0.7 | -0.9 | -0.6 |
| Net cash (used in) provided by financing activities | -9.9 | 0.8 | | | 572.8 | -37.0 | -45.1 | -69.3 |
| Net (decrease) increase in cash and cash equivalents | -0.3 | | | | 9.5 | | | |
| Cash and cash equivalents at the beginning of the period | | | | 4.3 | | | | |
| Cash and cash equivalents at the end of the period | | | | 4.3 | | | | |
| |
| Supplemental disclosures of cash flow information: | | | | | | | | |
| Cash paid during the period for: | | | | | | | | |
| Interest | 45.2 | 20.2 | | | 26.2 | 2.1 | 25.5 | 2.1 |
| Income taxes | 0.0 | | | | 0.0 | | | |
| Non-cash investing activities: | | | | | | | | |
| Increase in accrued capital expenditures and other | 0.1 | | | | 0.3 | | | |
| Non-cash financing activities: | | | | | | | | |
| Non-cash lease liability arising from obtaining right of use assets during the period | | 3.5 | | | 8.4 | | 0.7 | 3.2 |