| 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 | 69.3 | 69.5 | | | 157.0 | 168.1 | 164.8 | 163.9 |
| Adjustments to reconcile net income to net cash from operating activities: | | | | | | | | |
| Depreciation and amortization | 44.8 | 34.5 | | | 45.8 | 42.4 | 42.8 | 42.1 |
| Non-cash lease expense | 4.4 | 11.9 | | | 16.6 | 9.4 | 9.7 | 10.8 |
| Amortization of customer contract intangible assets | 3.6 | 3.6 | | | 7.2 | 7.2 | 7.2 | 7.2 |
| Amortization of deferred revenue | -2.7 | -2.7 | -2.7 | | -1.9 | -1.9 | -2.0 | -1.9 |
| Amortization of deferred financing costs and debt discount | 2.3 | 2.1 | | | 3.5 | 3.2 | 3.0 | 2.8 |
| Income from equity method investments | -45.3 | -45.1 | -45.8 | | -28.0 | -27.6 | -24.6 | -23.8 |
| Dividends from equity method investments | 17.0 | 16.3 | | | 26.2 | 23.7 | 20.8 | 22.7 |
| Other non-cash adjustments | 1.7 | 1.4 | | | 1.1 | 0.5 | | |
| Changes in assets and liabilities: | | | | | | | | |
| Accounts receivable | -12.2 | -1.6 | -8.8 | | 3.0 | -8.0 | 0.3 | -0.9 |
| Inventories and other current assets | -1.7 | -1.3 | | | -0.2 | -0.9 | 0.1 | -1.2 |
| Accounts payable and other current liabilities | -46.2 | -52.7 | | | -4.4 | 12.6 | -1.9 | 6.5 |
| Accounts receivable/payable to related parties | -71.8 | -18.7 | -31.3 | | 54.5 | 45.7 | 67.2 | 51.9 |
| Non-current assets and liabilities, net | -3.2 | -6.5 | -7.4 | | -21.3 | -14.9 | -14.2 | -0.5 |
| Net cash provided by operating activities | 63.8 | 114.3 | | | 260.7 | 261.4 | 275.2 | 280.6 |
| |
| Cash flows from investing activities: | | | | | | | | |
| Purchases of property, plant and equipment | -196.5 | -193.8 | -176.6 | | -49.8 | -27.5 | -23.1 | -18.7 |
| Proceeds from sales of property, plant and equipment | 0.5 | | | | 0.1 | 0.2 | | 0.3 |
| Purchases of intangible assets | -7.0 | -7.6 | -9.4 | | -5.4 | -4.3 | -2.3 | -0.6 |
| Business Combination, net of cash acquired | | | -1,247.4 | | -621.8 | | | |
| Distributions from equity method investments | | 2.6 | | | 5.1 | 5.4 | 8.8 | 6.3 |
| Net cash used in investing activities | -825.3 | -1,444.3 | -1,429.8 | | -670.5 | -24.9 | -16.4 | -14.7 |
| |
| Cash flows from financing activities: | | | | | | | | |
| Distributions to common unitholders - public | -54.8 | -54.3 | -53.4 | | -34.1 | -33.1 | -32.5 | -32.0 |
| Distributions to common unitholders - Delek Holdings | -205.4 | -203.8 | -202.7 | | -133.1 | -131.5 | -129.3 | -127.7 |
| Proceeds from revolving facility | 238.5 | 897.4 | | | 1,060.2 | 377.1 | 341.0 | 319.7 |
| Payments on revolving facility | -1,437.8 | -1,520.3 | -1,534.4 | | -468.1 | -850.5 | -829.6 | -819.5 |
| Deferred financing costs paid | -9.8 | -9.3 | -8.9 | | -0.6 | | | -6.2 |
| Payments on financing lease liabilities | -4.3 | -4.3 | -4.3 | | -2.9 | -2.9 | -2.2 | -1.4 |
| Net cash (used in) provided by financing activities | -9.2 | 573.6 | | | 421.4 | -247.1 | -258.8 | -267.1 |
| 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 | 65.4 | 46.4 | | | 55.8 | 41.8 | 44.6 | 32.9 |
| Income taxes | 0.0 | | | | 0.0 | | | |
| Non-cash investing activities: | | | | | | | | |
| Non-cash financing activities: | | | | | | | | |
| Non-cash lease liability arising from obtaining right of use assets during the period | | 11.9 | | | 12.3 | | 9.5 | 24.2 |