Annual report pursuant to Section 13 and 15(d)

COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Reconciliation of the Changes in the Plans' Benefit Obligations and Fair Value of Plan Assets (Detail)

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COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Reconciliation of the Changes in the Plans' Benefit Obligations and Fair Value of Plan Assets (Detail) - USD ($)
$ in Millions
 12 Months Ended
Apr. 30, 2021
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Benefit Obligations:        
Actuarial (gain)/loss $ (2,100) $ (20,900) $ (6,500)  
Fair Value of Plan Assets:        
Fair value of plan assets at beginning of year   58,175    
Fair value of plan assets at end of year   43,916 58,175  
United States        
Fair Value of Plan Assets:        
Fair value of plan assets at beginning of year   56,069    
Fair value of plan assets at end of year   42,273 56,069  
International Pension Benefits        
Fair Value of Plan Assets:        
Fair value of plan assets at beginning of year   2,106    
Fair value of plan assets at end of year   1,643 2,106  
Pension Benefits | United States        
Benefit Obligations:        
Projected benefit obligation at beginning of year   61,378 65,922  
Service cost   2,024 1,897 $ 1,853
Interest cost   1,950 1,948 1,977
Gross benefits paid   (2,151) (1,906)  
Plan participants’ contributions   0 0  
Plan amendments   145 66  
Actuarial (gain)/loss   (19,842) (6,390)  
Foreign currency exchange rate changes   0 0  
Curtailments and settlements   0 (159)  
Other   0 0  
Projected benefit obligation at end of year   43,504 61,378 65,922
Fair Value of Plan Assets:        
Fair value of plan assets at beginning of year   55,954 52,997  
Actual return on plan assets   (13,657) 4,706  
Employer contributions   1,912 157  
Plan participants’ contributions   0 0  
Gross benefits paid   (2,151) (1,906)  
Foreign currency exchange rate changes   0 0  
Curtailments and settlements   0 0  
Other   0 0  
Fair value of plan assets at end of year   42,058 55,954 52,997
Pension Benefits | International Pension Benefits        
Benefit Obligations:        
Projected benefit obligation at beginning of year   2,106 2,177  
Service cost   68 76 67
Interest cost   45 38 40
Gross benefits paid   (45) (46)  
Plan participants’ contributions   3 3  
Plan amendments   0 0  
Actuarial (gain)/loss   (575) (111)  
Foreign currency exchange rate changes   (150) (32)  
Curtailments and settlements   (40) (3)  
Other   4 4  
Projected benefit obligation at end of year   1,416 2,106 2,177
Fair Value of Plan Assets:        
Fair value of plan assets at beginning of year   2,106 1,835  
Actual return on plan assets   (349) 230  
Employer contributions   78 102  
Plan participants’ contributions   3 3  
Gross benefits paid   (45) (46)  
Foreign currency exchange rate changes   (144) (15)  
Curtailments and settlements   (6) (3)  
Other   0 0  
Fair value of plan assets at end of year   1,643 2,106 1,835
Postemployment Retirement Benefits | United States        
Benefit Obligations:        
Projected benefit obligation at beginning of year   2,592 2,759  
Service cost   30 28 29
Interest cost   83 81 91
Gross benefits paid   (268) (278)  
Plan participants’ contributions   31 35  
Plan amendments   0 0  
Actuarial (gain)/loss   (452) (26)  
Foreign currency exchange rate changes   0 0  
Curtailments and settlements   0 (7)  
Other   0 0  
Projected benefit obligation at end of year   2,016 2,592 2,759
Fair Value of Plan Assets:        
Fair value of plan assets at beginning of year   115 49  
Actual return on plan assets   (15) (8)  
Employer contributions   352 317  
Plan participants’ contributions   31 35  
Gross benefits paid   (268) (278)  
Foreign currency exchange rate changes   0 0  
Curtailments and settlements   0 0  
Other   0 0  
Fair value of plan assets at end of year   $ 215 $ 115 $ 49