v3.25.2
Employee Benefits - Schedule of Sensitivity Analysis for Actuarial Assumptions (Details) - JPY (¥)
¥ in Millions
Mar. 31, 2025
Mar. 31, 2024
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Percentage of reasonably possible increase in actuarial assumption 0.50%  
Percentage of reasonably possible decrease in actuarial assumption (0.50%)  
Japan | Discount Rate    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Percentage of reasonably possible increase in actuarial assumption 0.50% 0.50%
Percentage of reasonably possible decrease in actuarial assumption (0.50%) (0.50%)
Increase (decrease) in defined benefit obligation due to increase in assumption ¥ (7,178) ¥ (8,414)
Increase (decrease) in defined benefit obligation due to decrease in assumption ¥ 7,914 ¥ 9,092
Japan | Future Salary Increases    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Percentage of reasonably possible increase in actuarial assumption 0.50% 0.50%
Percentage of reasonably possible decrease in actuarial assumption (0.50%) (0.50%)
Increase (decrease) in defined benefit obligation due to increase in assumption ¥ 0 ¥ 0
Increase (decrease) in defined benefit obligation due to decrease in assumption ¥ 0 ¥ 0
Foreign | Discount Rate    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Percentage of reasonably possible increase in actuarial assumption 0.50% 0.50%
Percentage of reasonably possible decrease in actuarial assumption (0.50%) (0.50%)
Increase (decrease) in defined benefit obligation due to increase in assumption ¥ (14,452) ¥ (17,458)
Increase (decrease) in defined benefit obligation due to decrease in assumption ¥ 16,049 ¥ 19,599
Foreign | Future Salary Increases    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Percentage of reasonably possible increase in actuarial assumption 0.50% 0.50%
Percentage of reasonably possible decrease in actuarial assumption (0.50%) (0.50%)
Increase (decrease) in defined benefit obligation due to increase in assumption ¥ 4,871 ¥ 4,463
Increase (decrease) in defined benefit obligation due to decrease in assumption ¥ (4,397) ¥ (4,129)