| 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 |
| | 8-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Cash flow from operating activities | | | | | | | |
| Net income | -8.1 | 124.7 | -718.8 | 10.9 | 16.5 | -8.8 | -0.2 |
| |
| Adjustments to reconcile net income to net cash from operating activities: | | | | | | | |
| Depreciation and amortization | 292.8 | 290.9 | 329.4 | 405.8 | 451.8 | 434.2 | 376.0 |
| Amortization of deferred financing costs and debt discount | | 18.1 | 37.0 | 42.8 | 24.6 | 23.1 | 16.0 |
| Loss on extinguishment of debt, net | -10.8 | 49.3 | 74.0 | | | | |
| Interest rate swap termination | | 50.8 | | 50.8 | | | |
| Deferred income taxes | -28.9 | -6.5 | -13.9 | -11.4 | -7.4 | -41.2 | -2.2 |
| Equity in earnings of unconsolidated entities | -2.4 | -2.1 | -0.1 | | | | |
| Stock-based compensation | 12.8 | 13.8 | 13.7 | 10.8 | 8.1 | 7.7 | 4.8 |
| Gain on sale of unconsolidated entity (see Note 5) | | -28.1 | | 2.2 | | | |
| (Gain) loss on asset disposals | | -0.2 | 1.8 | 6.9 | | | |
| Other | | 0.1 | -0.3 | -0.4 | 7.8 | 0.9 | 0.9 |
| Changes in assets and liabilities: | | | | | | | |
| Accounts receivable | -4.2 | 24.5 | 12.6 | 25.6 | -52.8 | -10.5 | -3.5 |
| Other assets | 15.1 | 14.2 | -24.1 | 10.3 | 1.8 | -1.6 | -1.4 |
| Accounts payable, accrued expenses and other liabilities | | 27.8 | 37.9 | -3.3 | 41.2 | 5.9 | 2.8 |
| Net cash provided by operating activities | 460.1 | 499.2 | 157.2 | 617.0 | 472.8 | 405.3 | 376.0 |
| |
| Cash flow from investing activities | | | | | | | |
| Capital expenditures | | -385.9 | -317.1 | -350.5 | -423.6 | -166.0 | -34.9 |
| Proceeds from sale of other equipment | | 1.5 | | | | | |
| Net cash used in investing activities | -392.0 | -321.2 | 1.4 | -544.8 | -480.5 | -1,019.4 | -535.2 |
| |
| Cash flow from financing activities | | | | | | | |
| Repayment of debt | -194.0 | -2,260.0 | -2,044.7 | -21.1 | -21.1 | -21.1 | -22.0 |
| Proceeds from issuance of notes | | 2,380.0 | 2,250.0 | 345.0 | | 201.0 | 548.9 |
| Dividends paid | | -141.4 | -135.7 | -138.7 | -426.1 | -400.2 | |
| Distributions paid to noncontrolling interest | | -1.7 | -2.3 | -3.0 | -9.9 | -2.5 | |
| Payment for exchange of noncontrolling interest | -0.2 | | | | | -0.6 | |
| Borrowings under revolving credit facility | | 310.0 | 170.0 | 139.0 | 500.0 | 845.0 | 641.0 |
| Payments under revolving credit facility | | -220.0 | -635.0 | -204.0 | -140.0 | -565.0 | -641.0 |
| Payments for financing costs | | -27.7 | -50.9 | -49.5 | | -28.5 | -20.6 |
| |
| Costs related to the early repayment of debt | | | | | | | |
| Employee stock purchase program | | 0.7 | 0.7 | 0.9 | | | |
| Payments related to tax withholding for stock-based compensation | | -4.1 | -1.1 | -1.8 | -1.6 | -1.8 | -2.4 |
| Net cash provided by (used in) financing activities | -83.2 | -196.6 | -223.9 | 32.6 | -13.8 | 502.0 | 188.8 |
| |
| Non-cash investing and financing activities: | | | | | | | |
| Property and equipment acquired but not yet paid | | 15.4 | 15.2 | 17.0 | 17.9 | 15.3 | 5.8 |