Table:
|  | June 30, |  |
| --- | --- | --- |
| ($ in millions) | 2019 | 2018 |
| Accrued compensation and benefits | $71.2 | $83.3 |
| Derivative financial instruments | 16.7 | — |
| Accrued postretirement benefits | 14.7 | 15.4 |
| Deferred revenue | 10.5 | 10.4 |
| Accrued interest expense | 10.4 | 10.4 |
| Accrued income taxes | 4.2 | 1.4 |
| Accrued pension liabilities | 3.4 | 3.3 |
| Other | 26.5 | 24.4 |
| Total accrued liabilities | $157.6 | $148.6 |
Paragraphs:
9. Accrued Liabilities
Accrued liabilities consisted of the following as of June 30, 2019 and 2018:
Question:
In which years was accrued liabilities calculated?
Answer: 2019, 2018