Other liabilities consisted of the following: | | | | | | | | | (in millions) | December 31, 2019 | | December 31, 2018 | Operating lease liabilities (Note 12) | $ | 57.2 |
| | $ | — |
| Interest rate swaps and caps (Note 11) | 46.6 |
| | 10.7 |
| Unrecognized tax benefits (Note 16) | 32.8 |
| | 19.6 |
| Deferred revenue (Note 14) | 15.7 |
| | 0.9 |
| Non-qualified and other employee benefit plan liabilities | 11.6 |
| | 10.2 |
| Income tax payable | — |
| | 5.0 |
| Contingent consideration | — |
| | 0.1 |
| Other | 1.1 |
| | 8.2 |
| Total other liabilities | $ | 165.0 |
| | $ | 54.7 |
|
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