Annual report pursuant to Section 13 and 15(d)

COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Net Periodic Benefit Cost for Company Sponsored Pension and Postretirement Benefit Plans (Detail)

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COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Net Periodic Benefit Cost for Company Sponsored Pension and Postretirement Benefit Plans (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Pension Benefits | United States      
Net Periodic Benefit Cost:      
Service cost $ 1,897 $ 1,853 $ 1,439
Interest cost 1,948 1,977 2,067
Expected return on plan assets (3,327) (3,549) (3,130)
Amortization of:      
Amortization of prior service cost 139 218 218
Actuarial (gain) loss (3,284) 6,211 2,296
Net periodic benefit cost (2,627) 6,710 2,890
Pension Benefits | International Pension Benefits      
Net Periodic Benefit Cost:      
Service cost 76 67 57
Interest cost 38 40 47
Expected return on plan assets (68) (86) (76)
Amortization of:      
Amortization of prior service cost 2 2 2
Actuarial (gain) loss (12) 27 54
Net periodic benefit cost 36 50 84
Postemployment Retirement Benefits | United States      
Net Periodic Benefit Cost:      
Service cost 28 29 23
Interest cost 81 91 108
Expected return on plan assets (5) (8) (8)
Amortization of:      
Amortization of prior service cost 7 7 7
Actuarial (gain) loss 24 246 37
Net periodic benefit cost $ 135 $ 365 $ 167