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, 2016
Dec. 31, 2015
Dec. 31, 2014
U.S. Pension Benefits      
Net Periodic Benefit Cost:      
Service cost $ 1,412 $ 1,527 $ 1,137
Interest cost 1,828 1,694 1,604
Expected return on assets (2,516) (2,489) (2,257)
Amortization of:      
Transition obligation 0 0 0
Prior service cost 166 168 169
Actuarial (gain) loss 2,520 70 991
Curtailment and settlement loss 0 0 0
Defined Benefit Plan, Curtailments 0 0 0
Net periodic benefit cost 3,410 970 1,644
U.S. Postretirement Medical Benefits      
Net Periodic Benefit Cost:      
Service cost 28 34 62
Interest cost 124 117 152
Expected return on assets (6) (17) (25)
Amortization of:      
Transition obligation 0 0 0
Prior service cost 5 5 0
Actuarial (gain) loss 17 17 767
Curtailment and settlement loss 0 0 0
Defined Benefit Plan, Curtailments 0 0 356
Net periodic benefit cost 168 156 1,312
International Pension Benefits      
Net Periodic Benefit Cost:      
Service cost 49 48 43
Interest cost 41 44 49
Expected return on assets (58) (61) (61)
Amortization of:      
Transition obligation 0 0 0
Prior service cost 1 1 1
Actuarial (gain) loss 114 31 48
Curtailment and settlement loss 0 0 4
Defined Benefit Plan, Curtailments 0 0 0
Net periodic benefit cost $ 147 $ 63 $ 84