Have used a 2 % bleach solution and sprayed US bills with it. Drenched. Wait 5 minutes. Flip over and repeat. Use garage floor. Hang to dry over night. They handled the 2 % bleach fine. Or just put the money in a bag and let sit for two weeks.
A question on the two weeks. Is there information that COVID-19 can survive for up to two weeks on a fomite?