XML 134 R116.htm IDEA: XBRL DOCUMENT v3.22.1
Retirement Benefit Plans - Principal Assumptions for Actuarial Valuation of Present Value of Defined Benefit Obligation (Detail)
Dec. 31, 2021
Dec. 31, 2020
Disclosure of defined benefit plans [abstract]    
Discount rate 0.75% 0.40%
Future salary increase rate 3.00% 3.00%