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Pension Plans and Postretirement Benefits - Additional Information (Detail)
$ in Thousands
 1 Months Ended 12 Months Ended
Nov. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
retiree
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
retiree
Dec. 31, 2020
USD ($)
Defined Benefit Plan Disclosure [Line Items]          
Service cost     $ 11,800 $ 12,400 $ 11,300
Other components of net periodic benefit cost     (4,000) $ (92,900) (31,600)
Pension settlement related charges   $ 38,300      
Number of retirees transferred to annuity contract | retiree   400   400  
Other comprehensive loss as components of net periodic benefit cost for pension benefit in the current fiscal year     3,300    
Other comprehensive income as components of net periodic benefit cost for other benefit in the current fiscal year     $ 0    
Percentage of investment return on domestic plan assets     (22.00%) 9.00%  
Liability for group annuity contract   $ 45,600   $ 45,600  
Vesting period for employer matching contributions     3 years    
Thrift Plan          
Defined Benefit Plan Disclosure [Line Items]          
Percentage of matching contribution by employer     50.00%    
Thrift Plan | Maximum          
Defined Benefit Plan Disclosure [Line Items]          
Employer matching percentage     6.00%    
Thrift Plan and MII Thrift Plan          
Defined Benefit Plan Disclosure [Line Items]          
Employer contributions     $ 37,600 37,500 35,800
Pension Plan          
Defined Benefit Plan Disclosure [Line Items]          
Service cost     11,116 11,667 $ 10,650
Increase in pension plan benefit obligation     (295,100) (43,000)  
Pension settlement-related charges $ 12,600        
Pension, benefit obligation, payment for settlement $ 48,800        
Pension settlement related charges     $ 48,777 $ 38,330