boeing sick leave plan distribution as a Roth Rollover - employee never made contributions

my husband never got sick and his unused sick leave was converted to financial plan that was rolled into his voluntary investment plan. when he retired and rolled everything to our broker, he had to open up a Roth IRA for the sick portion. He took a distribution in 2019 right away. Do we have to pay taxes on the entire amount? I thought Roth's were tax free?