| In millions, except per share items | Jun-30-23 | Mar-31-23 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Revenues | 238.0 | 236.6 | 250.5 | 290.1 | 298.0 | 298.3 | 288.2 | 276.3 |
| Revenues growth | -18.0% | -20.6% | -13.1% | 5.0% | 16.9% | 16.8% | 28.9% | 33.5% |
| Costs of services | 59.0 | 54.9 | 53.0 | 50.0 | 47.1 | 46.6 | 44.6 | 44.4 |
| General and administrative expenses | 39.8 | 31.5 | 58.4 | 40.1 | 32.6 | 41.0 | 38.2 | 39.9 |
| Depreciation | 18.9 | 18.2 | 17.5 | 17.2 | 16.6 | 15.9 | 15.8 | 17.0 |
| Amortization of intangible assets | 85.6 | 85.1 | 85.1 | 85.1 | 85.2 | 85.2 | 85.2 | 85.2 |
| Total expenses | 203.3 | 189.7 | 214.1 | 192.4 | 181.4 | 188.7 | 183.8 | 186.5 |
| Operating income | 34.7 | 46.9 | 36.4 | 97.8 | 116.6 | 109.6 | 104.5 | 89.8 |
| Operating margin | 14.6% | 19.8% | 14.5% | 33.7% | 39.1% | 36.7% | 36.2% | 32.5% |
| Interest expense | -82.5 | -83.4 | -77.1 | -72.7 | -71.4 | -72.2 | -67.5 | -64.0 |
| Interest income | -2.4 | -3.2 | -0.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Gain on extinguishment of debt | | -36.8 | | | | 0.0 | 15.8 | |
| Gain on investments | | | | | 0.3 | | | 0.0 |
| Loss (gain) on change in fair value of Private Placement Warrants and Unvested Founder Shares | 0.8 | 1.6 | | 5.1 | -12.7 | | | |
| Net (loss) income before taxes | -46.2 | 1.9 | 9.0 | 20.0 | 58.2 | 34.5 | 97.8 | -55.7 |
| (Benefit) provision for income taxes | -9.8 | 1.7 | -10.7 | 6.5 | 14.3 | 9.6 | 19.6 | -8.8 |
| Net (loss) income | -36.4 | 0.2 | 19.7 | 13.5 | 44.0 | 24.9 | 78.2 | -46.9 |
| |
| Weighted average shares outstanding – Basic (in shares) | 643.3 | 638.7 | 639.1 | 639.0 | 638.5 | 651.0 | 652.5 | 655.6 |
| Weighted average shares outstanding – Diluted (in shares) | 643.3 | 640.9 | 639.9 | 640.1 | 639.0 | 651.5 | 652.9 | 655.6 |
| |
| Net (loss) income per share – Basic (in usd per share) | ($0.06) | | $0.03 | $0.02 | $0.07 | $0.04 | $0.12 | ($0.07) |
| Net (loss) income per share – Diluted (in usd per share) | ($0.06) | | $0.03 | $0.02 | $0.07 | $0.04 | $0.12 | ($0.07) |
| Comprehensive (loss) income | -36.4 | 0.2 | 19.7 | 13.5 | 44.0 | 24.9 | 78.2 | -46.9 |