| In millions, except per share items | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Revenues | 782.1 | 792.6 | 881.1 | 869.5 | 765.7 | 467.5 | | |
| Revenues growth | -1.3% | -10.0% | 1.3% | 13.6% | 63.8% | | | |
| Expenses | | | | | | | | |
| Depreciation | 235.5 | 236.9 | 294.7 | 266.6 | 260.5 | 220.7 | | |
| Acquisition-related expenses | 7.5 | 1.0 | 10.2 | 6.1 | 17.3 | 10.2 | | |
| General and administrative | 18.1 | 16.1 | 16.5 | 16.0 | 12.2 | 9.9 | | |
| Total Expenses | 286.4 | 472.8 | 355.9 | 429.4 | 412.9 | 313.8 | 262.0 | 246.2 |
| |
| Other income (expense) | | | | | | | | |
| Interest income | 0.6 | 4.3 | 3.2 | 2.5 | 3.9 | 0.8 | | |
| Interest expense | -265.9 | -228.8 | -249.9 | -215.5 | -184.2 | -116.2 | | |
| Gain on unhedged interest rate swaps, net | 39.1 | 4.7 | -3.9 | | | | | |
| Other | -1.6 | -19.0 | -7.6 | -7.2 | -1.6 | -0.7 | | |
| Non-operating income (expense) | -127.1 | -149.7 | -258.2 | -220.2 | -181.9 | -116.2 | | |
| Income before income taxes | 368.6 | 170.1 | 266.9 | 219.9 | 170.9 | | | |
| Provision for income taxes | -9.3 | -9.7 | 7.6 | 5.8 | -4.9 | 2.3 | | |
| Net income | 359.2 | 160.4 | 275.6 | 244.7 | 166.0 | 37.6 | -262.0 | -246.2 |
| Less: Net income attributable to noncontrolling interest | -153.7 | -84.2 | -185.3 | -177.6 | -124.2 | 5.4 | 262.0 | 246.2 |
| Net income attributable to Class A shareholders | 205.5 | 76.1 | 90.3 | 67.1 | 41.8 | | | |
| |
| Weighted average Class A shares outstanding | | | | | | | | |
| Basic (in shares) | | | | | | | | |
| Diluted (in shares) | | | | | | | | |
| Earnings per Class A share | | | | | | | | |
| Basic (in usd per share) | | | | | | | | |
| Diluted (in usd per share) | | | | | | | | |
| Weighted average units outstanding | | | | | | | | |
| Basic (in shares) | | | | | | | | |
| Diluted (in shares) | | | | | | | | |
| Net income (loss) per Operating Partnership unit (Basic) (in dollars per share) | | | | | | | | |
| Net income | | | | | | | | |