pre_text: 9. Accrued Liabilities Accrued liabilities consisted of the following as of June 30, 2019 and 2018:
table: June 30,
table: ($ in millions) 2019 2018
table: Accrued compensation and benefits $71.2 $83.3
table: Derivative financial instruments 16.7 —
table: Accrued postretirement benefits 14.7 15.4
table: Deferred revenue 10.5 10.4
table: Accrued interest expense 10.4 10.4
table: Accrued income taxes 4.2 1.4
table: Accrued pension liabilities 3.4 3.3
table: Other 26.5 24.4
table: Total accrued liabilities $157.6 $148.6
question: Analyse this data from a financial earnings document. What was the change in Accrued pension liabilities in 2019 from 2018?