Annual report pursuant to Section 13 and 15(d)

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

v3.10.0.1
COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Additional Information (Detail)
Employee in Thousands, $ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2007
USD ($)
Dec. 31, 2016
USD ($)
Employee
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Employee
Defined Benefit Plan Disclosure [Line Items]          
Defined benefit plan net actuarial loss     $ 3,174 $ (4,441)  
Discount rate     4.45% 3.81% 4.34%
Actuarial Gain Loss Corridor Threshold   10.00%     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   22     22
Pension and postretirement benefit expense     $ 2,242 $ 1,643 $ 3,725
Health care cost trends, initial annual rate increase     6.00%    
Health care cost trends, an ultimate trend rate     4.50%    
Expected year when ultimate trend rate to be reached     2022    
Accumulated benefit obligation for pension plans     $ 45,704 45,776  
Employer contributions   $ 685 186 7,794 2,668
Fair value of plan assets     $ 40,864 $ 43,448  
Plan assets target allocation     100.00% 100.00%  
Pension Benefits          
Defined Benefit Plan Disclosure [Line Items]          
Employer contributions     $ 23 $ 22  
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     $ 87 93  
Domestic          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     39,580 42,115  
Domestic | Cash and Cash Equivalents [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     157 5,725  
International Package          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     1,284 1,333  
International Package | Cash and Cash Equivalents [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     45 78  
Fixed Income Securities [Member] | Domestic          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     16,669 11,634  
Fixed Income Securities [Member] | International Package          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     324 301  
Equity securities | Domestic          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     13,667 16,224  
Equity securities | International Package          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     586 637  
Other Investments [Member] | Private Equity and Real Estate          
Defined Benefit Plan Disclosure [Line Items]          
Unfunded commitments to limited partnerships     2,090    
Other Investments [Member] | Domestic | Hedge Funds          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     3,154 2,910  
Other Investments [Member] | Domestic | Risk Parity Funds [Domain]          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     207 359  
Other Investments [Member] | Domestic | Structured Products          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     1,989 2,031  
Other Investments [Member] | Domestic | Structured Products [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     138    
Other Investments [Member] | International Package | Other          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     208 193  
Other Investments [Member] | International Package | Structured Products          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     121 124  
Employee Defined Contribution Plans [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Contributions charged to expense     127 119 111
Pension and postretirement benefit expense     28 23 4
Defined Contribution Money Purchase Plans [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Contributions charged to expense     $ 92 $ 91 $ 82
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%    
Minimum          
Defined Benefit Plan Disclosure [Line Items]          
Defined contribution plan, employer contribution (percentage)     3.00%    
Minimum | U.S. Pension Benefits          
Defined Benefit Plan Disclosure [Line Items]          
Postretirement medical plans service minimum eligibility year     10 years 10 years  
Postretirement medical plans service minimum eligibility age     55 years    
Minimum | Domestic | Cash and Cash Equivalents [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     0.00% 0.00%  
Minimum | International Package | 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% 0.00%  
Minimum | Fixed Income Securities [Member] | Domestic          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     35.00% 25.00%  
Minimum | Fixed Income Securities [Member] | International Package          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     25.00% 25.00%  
Minimum | Equity securities | Domestic          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     25.00% 35.00%  
Minimum | Equity securities | International Package          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     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] | Domestic | Hedge Funds          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     5.00% 5.00%  
Minimum | Other Investments [Member] | Domestic | Other          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     1.00% 1.00%  
Minimum | Other Investments [Member] | Domestic | Structured Products          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     1.00% 1.00%  
Minimum | Other Investments [Member] | Domestic | Structured Products [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     1.00% 0.00%  
Minimum | Other Investments [Member] | International Package | Other          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     1.00% 0.00%  
Minimum | Other Investments [Member] | International Package | 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%  
Minimum | Other Investments [Member] | International Package | Structured Products [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     0.00% 0.00%  
Minimum | Employee Defined Contribution Plans [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Defined contribution plan, employer contribution (percentage)     5.00%    
Maximum          
Defined Benefit Plan Disclosure [Line Items]          
Defined contribution plan, employer contribution (percentage)     8.00%    
Maximum | Domestic | Cash and Cash Equivalents [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     5.00% 5.00%  
Maximum | International Package | 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%  
Maximum | Fixed Income Securities [Member] | Domestic          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     55.00% 35.00%  
Maximum | Fixed Income Securities [Member] | International Package          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     45.00% 50.00%  
Maximum | Equity securities | Domestic          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     55.00% 55.00%  
Maximum | Equity securities | International Package          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     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] | Domestic | Hedge Funds          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     15.00% 15.00%  
Maximum | Other Investments [Member] | Domestic | Other          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     10.00% 10.00%  
Maximum | Other Investments [Member] | Domestic | 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%  
Maximum | Other Investments [Member] | Domestic | Structured Products [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     5.00% 5.00%  
Maximum | Other Investments [Member] | International Package | Other          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     20.00% 20.00%  
Maximum | Other Investments [Member] | International Package | 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%  
Maximum | Other Investments [Member] | International Package | Structured Products [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum (Deprecated 2017-01-31)     10.00% 0.00%  
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     $ 1,550    
Multiemployer Plans, Withdrawal Obligation $ 6,100        
Increase in benefit obligation     1,600    
Pension obligations     4,000    
Adjustments          
Defined Benefit Plan Disclosure [Line Items]          
Defined benefit plan, actuarial gain       $ 569  
Defined benefit plan, curtailment       1,525  
Defined benefit plan net actuarial loss       956  
Pro Forma | Multiemployer Plans, Pension | Maximum | Central States, South East & South West Areas Health and Welfare Fund          
Defined Benefit Plan Disclosure [Line Items]          
Increase in benefit obligation     2,400    
Defined Benefit Plan, Actuarial Assumptions Discount Rate          
Defined Benefit Plan Disclosure [Line Items]          
Defined benefit plan net actuarial loss     4,829 4,124  
Defined Benefit Plan, Actuarial Assumptions Demographic and Assumption Changes [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Defined benefit plan net actuarial loss     $ (105) $ (317)