| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 8-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Cash flows from operating activities: | | | | | | | | |
| Net loss | | -19.9 | 189.1 | -393.7 | 42.4 | 86.1 | -38.2 | -222.2 |
| Adjustments to reconcile net loss to net cash provided by operating activities: | | | | | | | | |
| Depreciation and amortization | | 120.0 | 119.1 | 111.6 | 106.8 | 114.9 | 112.7 | 105.9 |
| Noncash lease expense | | 1.1 | 3.2 | | | | | |
| Amortization of debt issuance costs | | 7.0 | 6.6 | 6.3 | 4.3 | 4.2 | 4.0 | 4.3 |
| Unit-based and noncash compensation | | 4.7 | 8.1 | 8.2 | 8.3 | 8.0 | 8.0 | 7.0 |
| Income from equity method investees | | -7.9 | -11.3 | 337.9 | 10.9 | 2.2 | 30.3 | 6.6 |
| Distributions from equity method investees | | 26.8 | 28.2 | 37.3 | 35.3 | 40.2 | 45.0 | 34.6 |
| Gain on asset sales, net | | | | | | | | |
| Long-lived asset impairment | | 10.2 | 13.1 | 60.5 | 7.2 | 188.7 | 1.8 | 9.3 |
| Changes in operating assets and liabilities: | | | | | | | | |
| Accounts receivable | | -0.2 | 35.4 | -5.5 | -21.5 | 25.1 | -7.8 | 3.3 |
| Trade accounts payable | | -0.1 | -4.1 | -0.1 | 0.1 | -3.2 | 2.0 | -1.5 |
| Accrued expenses | | 1.4 | 2.8 | -10.6 | 9.5 | 1.1 | 4.6 | -2.0 |
| Deferred revenue, net | | -5.3 | 6.0 | | | | | |
| Ad valorem taxes payable | | -0.5 | 0.6 | -1.5 | 2.2 | -2.3 | 0.3 | 1.1 |
| Accrued interest | | 4.7 | -3.3 | 0.0 | 0.0 | -5.2 | | -1.4 |
| Accrued environmental remediation, net | | 2.7 | -2.0 | | | | | |
| Net cash provided by operating activities | | 165.1 | 198.6 | 161.7 | 227.9 | 237.8 | 230.5 | 191.4 |
| |
| Cash flows from investing activities: | | | | | | | | |
| Capital expenditures | | -25.0 | -43.1 | -182.3 | -200.6 | -124.2 | -142.7 | -272.2 |
| Proceeds from asset sale | | 0.4 | 0.3 | | | | | |
| Investment in Double E equity method investee | | | | | | | -31.6 | -86.2 |
| Other, net | | | 2.5 | 0.3 | -0.3 | -0.5 | -0.4 | 0.3 |
| Net cash provided by (used in) investing activities | | -165.7 | -140.6 | -90.9 | -216.3 | -148.7 | -534.1 | -646.7 |
| |
| Cash flows from financing activities: | | | | | | | | |
| Repayments on ABL Facility | | -234.0 | | | | -300.0 | | |
| Borrowings on ABL Facility | | | | | | | | |
| Distributions on Subsidiary Series A Preferred Units | | | | -28.5 | -180.7 | -179.1 | | -152.1 |
| Other, net | | -0.9 | -2.9 | -4.5 | -4.2 | -3.1 | -1.2 | -1.8 |
| Net cash used in financing activities | | 4.7 | -79.4 | -50.1 | -8.7 | -95.1 | 289.3 | 449.3 |
| Net change in cash, cash equivalents and restricted cash | | 4.0 | -21.4 | | | | | |