| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 |
| | 10-K | 10-K | 10-K | 10-K | 10-K |
| Cash flows from operating activities: | | | | | |
| Net income | 73.1 | 158.2 | -194.1 | -22.6 | 24.3 |
| Adjustments to reconcile net income to net cash from operating activities: | | | | | |
| Depreciation and amortization, including patient equipment depreciation | 351.2 | 258.1 | 82.4 | 62.6 | |
| Equity-based compensation | 22.4 | 25.3 | 18.7 | 15.2 | 0.9 |
| Change in fair value of warrant liability | -17.2 | -53.2 | 135.4 | 7.7 | |
| Reduction in the carrying amount of operating lease right-of-use assets | 32.3 | 28.6 | | | |
| Deferred income tax expense | 18.0 | 22.4 | -21.1 | 0.5 | -2.9 |
| Change in fair value of interest rate swaps, net of reclassification adjustment | -20.1 | -56.1 | 132.5 | 19.1 | -0.5 |
| Amortization of deferred financing costs | 5.2 | 5.4 | 1.9 | 1.3 | 0.5 |
| Other | -0.3 | -3.6 | -5.6 | 0.8 | |
| Changes in operating assets and liabilities, net of effects from acquisitions: | | | | | |
| Accounts receivable | -0.2 | -29.7 | -29.5 | -20.2 | -22.0 |
| Inventory | -6.3 | -14.9 | -19.4 | -1.3 | 2.3 |
| Prepaid and other assets | -13.1 | 2.7 | -10.8 | -9.6 | -1.6 |
| Operating lease obligations | -31.2 | -28.0 | | | |
| Operating liabilities | -57.1 | -83.4 | 136.6 | 14.2 | 2.7 |
| Net cash provided by operating activities | 373.9 | 275.7 | 195.6 | 60.4 | 68.4 |
| |
| Cash flows from investing activities: | | | | | |
| Purchases of equipment and other fixed assets | -391.4 | -203.3 | -39.8 | -21.3 | -9.9 |
| Payments for business acquisitions, net of cash acquired | -19.0 | -1,620.3 | -769.3 | -63.5 | -86.3 |
| Payments for cost method investments | -0.7 | -1.1 | -8.7 | | |
| Net cash used in investing activities | -411.2 | -1,824.8 | -815.7 | -84.9 | -96.3 |
| |
| Cash flows from financing activities: | | | | | |
| Proceeds from borrowings on long-term debt | | | | | 140.0 |
| Repayments on long-term debt | -20.0 | -827.3 | -547.5 | -237.6 | -24.8 |
| Payments for shares purchased under share repurchase program | -14.0 | | | -23.7 | |
| Proceeds from the exercise of stock options | 2.5 | 12.3 | | | |
| Proceeds received in connection with employee stock purchase plan | 1.6 | 1.0 | 0.1 | | |
| Distributions to noncontrolling interest | -2.0 | -1.1 | -0.8 | -1.3 | -0.3 |
| Payments for tax withholdings from restricted stock vesting and stock option exercises | -3.5 | -3.6 | -0.1 | -0.5 | |
| Payments of contingent consideration and deferred purchase price from acquisitions | -14.5 | -25.2 | -4.0 | -13.0 | |
| Net cash used in financing activities | -66.1 | 1,598.7 | 643.2 | 76.1 | 48.8 |
| Cash at beginning of period | | | | | 0.0 |
| |
| Supplemental disclosures: | | | | | |
| Cash paid for interest | 108.9 | 73.6 | 35.8 | 23.1 | 7.3 |
| Cash paid for income taxes | 14.9 | 14.8 | 7.5 | 1.3 | 0.4 |
| Noncash investing and financing activities: | | | | | |
| Equipment acquired under finance lease obligations | 1.3 | 23.0 | 40.0 | 36.3 | 27.1 |
| Unpaid equipment and other fixed asset purchases at end of period | 24.2 | 13.9 | 7.9 | 8.5 | 12.6 |
| Assets subject to operating lease obligations | 22.5 | 12.8 | | | |
| Operating lease obligations | -22.5 | -12.8 | | | |
| Deferred purchase price in connection with acquisitions | 0.5 | 4.5 | 0.0 | 1.6 | |