Annual report pursuant to Section 13 and 15(d)

COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Additional Information (Detail)

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COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Additional Information (Detail)
 1 Months Ended 3 Months Ended 12 Months Ended
Jun. 30, 2017
USD ($)
Dec. 31, 2019
USD ($)
Employee
Sep. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2019
USD ($)
Employee
$ / shares
Dec. 31, 2018
USD ($)
$ / shares
Dec. 31, 2017
USD ($)
Defined Benefit Plan Disclosure [Line Items]                        
Defined benefit plan net actuarial loss                   $ 8,040,000,000.000 $ 3,174,000,000  
Discount rate                   3.55% 4.45% 3.81%
Actuarial Gain Loss Corridor Threshold                       10.00%
Return on plan assets                       2.75%
Share-based Compensation Arrangement by Share-based Payment Award, Target Award Maximum, Percentage                   200.00%    
Number of covered persons | Employee   18,800               18,800    
Lump Sum Pension Payments   $ 820,000,000                    
Pension and postretirement benefit expense                   $ 3,141,000,000 $ 2,242,000,000 $ 1,643,000,000
Health care cost trends, initial annual rate increase   6.50%               6.50%    
Health care cost trends, an ultimate trend rate   4.50%               4.50%    
Accumulated benefit obligation for pension plans   $ 57,553,000,000       $ 45,704,000,000       $ 57,553,000,000 45,704,000,000  
Employer contributions                   2,362,000,000 186,000,000 7,794,000,000
Fair value of plan assets   47,767,000,000       40,864,000,000       $ 47,767,000,000 $ 40,864,000,000  
Plan assets target allocation                   100.00% 100.00%  
Decreas in projected benefit obligation                   $ 900,000,000    
Change in unrecognized pension and postretirement benefit costs, net of tax                   1,129,000,000 $ (272,000,000) 148,000,000
Net Income   (106,000,000) $ 1,750,000,000 $ 1,685,000,000 $ 1,111,000,000 453,000,000 $ 1,508,000,000 $ 1,485,000,000 $ 1,345,000,000 4,440,000,000 4,791,000,000 $ 4,905,000,000
Pension Benefits                        
Defined Benefit Plan Disclosure [Line Items]                        
Employer contributions                   27,000,000 23,000,000  
U.S. Pension Benefits                        
Defined Benefit Plan Disclosure [Line Items]                        
Discount rate                       0.32%
Postretirement Medical Benefits                        
Defined Benefit Plan Disclosure [Line Items]                        
Employer contributions                   82,000,000 87,000,000  
International Pension Benefits                        
Defined Benefit Plan Disclosure [Line Items]                        
Fair value of plan assets   1,558,000,000       1,284,000,000       1,558,000,000 1,284,000,000  
International Pension Benefits | Cash and Cash Equivalents [Member]                        
Defined Benefit Plan Disclosure [Line Items]                        
Fair value of plan assets   $ 72,000,000       $ 45,000,000       72,000,000 45,000,000  
International Pension Benefits | Pension Benefits                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined benefit plan, curtailment                   0 0 $ 2,000,000
Defined benefit plan net actuarial loss                   $ (213,000,000) $ 81,000,000  
Discount rate                   2.94% 2.78% 2.75%
Discount rate   2.21%       2.94%       2.21% 2.94%  
Projected benefit obligation, Projected Benefit Obligation Exceeds the Fair Value of the Plan Assets   $ 1,319,000,000       $ 630,000,000       $ 1,319,000,000 $ 630,000,000  
Pension obligations   377,000,000       299,000,000       377,000,000 299,000,000  
Fair value of plan assets   1,558,000,000       1,284,000,000       1,558,000,000 1,284,000,000 $ 1,333,000,000
Fixed Income Securities [Member] | International Pension Benefits                        
Defined Benefit Plan Disclosure [Line Items]                        
Fair value of plan assets   381,000,000       324,000,000       381,000,000 324,000,000  
Equity securities | International Pension Benefits                        
Defined Benefit Plan Disclosure [Line Items]                        
Fair value of plan assets   730,000,000       586,000,000       730,000,000 586,000,000  
Other Investments [Member] | Private Equity and Real Estate                        
Defined Benefit Plan Disclosure [Line Items]                        
Unfunded commitments to limited partnerships   2,241,000,000               2,241,000,000    
Other Investments [Member] | International Pension Benefits | Other                        
Defined Benefit Plan Disclosure [Line Items]                        
Fair value of plan assets   247,000,000       208,000,000       247,000,000 208,000,000  
Other Investments [Member] | International Pension Benefits | Structured Products                        
Defined Benefit Plan Disclosure [Line Items]                        
Fair value of plan assets   $ 128,000,000       $ 121,000,000       128,000,000 121,000,000  
Change in Assumptions for Defined Benefit Plans [Member]                        
Defined Benefit Plan Disclosure [Line Items]                        
Change in unrecognized pension and postretirement benefit costs, net of tax                   810,000,000    
Net Income                   $ 616,000,000    
Earnings Per Share, Basic and Diluted | $ / shares                   $ 0.71    
Employee Defined Contribution Plans [Member]                        
Defined Benefit Plan Disclosure [Line Items]                        
Contributions charged to expense                   $ 130,000,000 127,000,000 119,000,000
Pension and postretirement benefit expense                   67,000,000 28,000,000 23,000,000
Defined Contribution Money Purchase Plans [Member]                        
Defined Benefit Plan Disclosure [Line Items]                        
Contributions charged to expense                   $ 97,000,000 $ 92,000,000 $ 91,000,000
Discounted Employee Stock Purchase Modified Plan [Member]                        
Defined Benefit Plan Disclosure [Line Items]                        
Share Based Compensation Arrangement By Share Based Payment Award Exercisable Price Percentage Of Closing Price Of Another Class Of Stock   95.00%               95.00%    
Minimum | U.S. Pension Benefits                        
Defined Benefit Plan Disclosure [Line Items]                        
Postretirement medical plans service minimum eligibility year                   10 years    
Postretirement medical plans service minimum eligibility age                   55 years    
Minimum | International Pension Benefits | Cash and Cash Equivalents [Member]                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)   1.00%       1.00%       1.00% 1.00%  
Minimum | Fixed Income Securities [Member] | International Pension Benefits                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)   25.00%       25.00%       25.00% 25.00%  
Minimum | Equity securities | International Pension Benefits                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)   30.00%       30.00%       30.00% 30.00%  
Minimum | Other Investments [Member] | Private Equity and Real Estate                        
Defined Benefit Plan Disclosure [Line Items]                        
Redemption notice period, lower limit                   10 years    
Minimum | Other Investments [Member] | International Pension Benefits | Other                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)   0.00%       1.00%       0.00% 1.00%  
Minimum | Other Investments [Member] | International Pension Benefits | Structured Products                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)   5.00%       5.00%       5.00% 5.00%  
Minimum | Employee Defined Contribution Plans [Member]                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined contribution plan, employer contribution (percentage)                   5.00%    
Maximum | International Pension Benefits | Cash and Cash Equivalents [Member]                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)   10.00%       10.00%       10.00% 10.00%  
Maximum | Fixed Income Securities [Member] | International Pension Benefits                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)   45.00%       45.00%       45.00% 45.00%  
Maximum | Equity securities | International Pension Benefits                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)   60.00%       60.00%       60.00% 60.00%  
Maximum | Other Investments [Member] | Private Equity and Real Estate                        
Defined Benefit Plan Disclosure [Line Items]                        
Redemption notice period, upper limit                   15 years    
Maximum | Other Investments [Member] | International Pension Benefits | Other                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)   10.00%       2.00%       10.00% 2.00%  
Maximum | Other Investments [Member] | International Pension Benefits | Structured Products                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)   10.00%       10.00%       10.00% 10.00%  
Maximum | Employee Defined Contribution Plans [Member]                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined contribution plan, employer contribution (percentage)                   8.00%    
Multiemployer Plans, Pension | Central States, South East & South West Areas Health and Welfare Fund                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined benefit plan net actuarial loss                   $ 603,000,000 $ 1,550,000,000  
Multiemployer Plans, Withdrawal Obligation                   6,100,000,000    
Projected benefit obligation, Projected Benefit Obligation Exceeds the Fair Value of the Plan Assets   $ 2.6               2.6    
Increase in benefit obligation                   2,200,000,000    
Pension obligations   $ 4,800,000,000               4,800,000,000    
Adjustments                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined benefit plan, actuarial gain $ 569,000,000                      
Defined benefit plan, curtailment 1,525,000,000                      
Defined benefit plan net actuarial loss $ 956,000,000                      
Net Income                   $ (120,000,000) $ 23,000,000  
Earnings Per Share, Basic and Diluted | $ / shares                   $ (0.14) $ 0.03  
Defined Benefit Plan, Actuarial Assumptions Discount Rate                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined benefit plan net actuarial loss                   $ 7,477,000,000 $ 4,829,000,000  
Defined Benefit Plan, Actuarial Assumptions Demographic and Assumption Changes [Member]                        
Defined Benefit Plan Disclosure [Line Items]                        
Defined benefit plan net actuarial loss                   $ 40,000,000 $ (105,000,000)