Long-duration Contracts - Weighted Average Durations and Interest Rates (Details)	Mar. 31, 2023	Mar. 31, 2022
Insurance [Abstract]
Weighted-average liability duration (in years)	10 years 1 month 6 days	10 years 7 months 6 days
Weighted-average interest accretion rate	3.20%	2.70%
Weighted-average current discount rate	5.30%	3.70%