COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS (Tables)

v3.10.0.1

COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS (Tables)	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
Net Periodic Benefit Cost for Pension and Postretirement Benefit Plans	Information about net periodic benefit cost for the company-sponsored pension and postretirement defined benefit plans is as follows (in millions):   U.S. Pension Benefits   U.S. Postretirement Medical Benefits   International Pension Benefits   2018   2017   2016   2018   2017   2016   2018   2017   2016 Net Periodic Benefit Cost:                                   Service cost $ 1,661   $ 1,543   $ 1,412   $ 29   $ 29   $ 28   $ 62   $ 60   $ 49 Interest cost 1,799   1,813   1,828   104   112   124   45   40   41 Expected return on assets (3,201 )   (2,883 )   (2,516 )   (8 )   (7 )   (6 )   (77 )   (66 )   (58 ) Amortization of prior service cost 193   192   166   7   7   5   1   1   1 Actuarial (gain) loss 1,603   729   2,520   —   53   17   24   18   114 Curtailment and settlement loss —   —   —   —   —   —   —   2   — Net periodic benefit cost $ 2,055   $ 1,394   $ 3,410   $ 132   $ 194   $ 168   $ 55   $ 55   $ 147
Weighted Average Actuarial Assumptions Used Disclosure	The table below provides the weighted-average actuarial assumptions used to determine the net periodic benefit cost.   U.S. Pension Benefits   U.S. Postretirement Medical Benefits   International Pension Benefits   2018   2017   2016   2018   2017   2016   2018   2017   2016 Discount rate 3.84 %   4.41 %   4.86 %   3.82 %   4.23 %   4.79 %   2.78 %   2.75 %   3.51 % Rate of compensation increase 4.25 %   4.27 %   4.29 %   N/A   N/A   N/A   3.22 %   3.17 %   3.04 % Expected return on assets 7.75 %   8.75 %   8.75 %   7.20 %   8.75 %   8.75 %   5.76 %   5.65 %   5.73 % Cash balance interest credit rate 2.50 %   2.91 %   3.36 %   N/A   N/A   N/A   3.07 %   2.65 %   3.00 % The table below provides the weighted-average actuarial assumptions used to determine the benefit obligations of our plans.   U.S. Pension Benefits   U.S. Postretirement Medical Benefits   International Pension Benefits   2018   2017   2018   2017   2018   2017 Discount rate 4.50 %   3.84 %   4.51 %   3.82 %   2.94 %   2.78 % Rate of compensation increase 4.25 %   4.25 %   N/A   N/A   3.24 %   3.23 % Cash balance interest credit rate 2.98 %   2.50 %   N/A   N/A   3.17 %   3.07 %
Reconciliation of the Changes in the Plans' Benefit Obligations and Fair Value of Plan Assets	The following table provides a reconciliation of the changes in the plans’ benefit obligations and fair value of plan assets as of the respective measurement dates in each year (in millions).   U.S. Pension Benefits   U.S. Postretirement Medical Benefits   International Pension Benefits   2018   2017   2018   2017   2018   2017 Benefit Obligations:                       Projected benefit obligation at beginning of year $ 45,847   $ 41,069   $ 2,792   $ 2,730   $ 1,651   $ 1,425 Service cost 1,661   1,543   29   29   62   60 Interest cost 1,799   1,813   104   112   45   40 Gross benefits paid (1,390 )   (1,309 )   (263 )   (264 )   (33 )   (32 ) Plan participants’ contributions —   —   26   26   3   3 Plan amendments(1) 331   —   —   —   13   — Actuarial (gain)/loss (2,915 )   4,256   (178 )   159   (81 )   26 Foreign currency exchange rate changes —   —   —   —   (110 )   129 Curtailments and settlements —   (1,525 )   —   —   (1 )   (3 ) Other —   —   —   —   3   3 Projected benefit obligation at end of year $ 45,333   $ 45,847   $ 2,510   $ 2,792   $ 1,552   $ 1,651                         (1) Resulting from a new Teamster national master agreement.               U.S. Pension Benefits   U.S. Postretirement Medical Benefits   International Pension Benefits   2018   2017   2018   2017   2018   2017 Fair Value of Plan Assets:                       Fair value of plan assets at beginning of year $ 41,932   $ 31,215   $ 183   $ 15   $ 1,333   $ 1,092 Actual return on plan assets (1,007 )   4,717   (7 )   (2 )   (6 )   96 Employer contributions 19   7,309   87   408   80   77 Plan participants’ contributions —   —   26   26   3   3 Gross benefits paid (1,390 )   (1,309 )   (263 )   (264 )   (33 )   (32 ) Foreign currency exchange rate changes —   —   —   —   (92 )   100 Curtailments and settlements —   —   —   —   (1 )   (3 ) Fair value of plan assets at end of year $ 39,554   $ 41,932   $ 26   $ 183   $ 1,284   $ 1,333
Funded Status as of the Respective Measurement Dates in Each Year and the Amounts Recognized in Balance Sheet	The following table discloses the funded status of our plans and the amounts recognized in our consolidated balance sheets as of December 31st (in millions):   U.S. Pension Benefits   U.S. Postretirement Medical Benefits   International Pension Benefits   2018   2017   2018   2017   2018   2017 Funded Status:                       Fair value of plan assets $ 39,554   $ 41,932   $ 26   $ 183   $ 1,284   $ 1,333 Benefit obligation (45,333 )   (45,847 )   (2,510 )   (2,792 )   (1,552 )   (1,651 ) Funded status recognized at December 31 $ (5,779 )   $ (3,915 )   $ (2,484 )   $ (2,609 )   $ (268 )   $ (318 ) Funded Status Recognized in our Balance Sheet:                       Other non-current assets $ —   $ 284   $ —   $ —   $ 35   $ 35 Other current liabilities (20 )   (18 )   (195 )   (77 )   (4 )   (5 ) Pension and postretirement benefit obligations (5,759 )   (4,181 )   (2,289 )   (2,532 )   (299 )   (348 ) Net liability at December 31 $ (5,779 )   $ (3,915 )   $ (2,484 )   $ (2,609 )   $ (268 )   $ (318 ) Amounts Recognized in AOCI:                       Unrecognized net prior service cost $ (1,018 )   $ (880 )   $ (21 )   $ (29 )   $ (14 )   $ (2 ) Unrecognized net actuarial gain (loss) (3,967 )   (4,277 )   (32 )   (195 )   (100 )   (126 ) Gross unrecognized cost at December 31 (4,985 )   (5,157 )   (53 )   (224 )   (114 )   (128 ) Deferred tax assets (liabilities) at December 31 1,205   1,840   13   69   28   31 Net unrecognized cost at December 31 $ (3,780 )   $ (3,317 )   $ (40 )   $ (155 )   $ (86 )   $ (97 )
Projected Benefit Obligation, Accumulated Benefit Obligation, and Fair Value of Plan Assets for Pension Plans With an Accumulated Benefit Obligation in Excess of Plan Assets	At December 31, 2018 and 2017, the projected benefit obligation, the accumulated benefit obligation and the fair value of plan assets for pension plans with benefit obligations in excess of plan assets were as follows (in millions):   Projected Benefit Obligation Exceeds the Fair Value of Plan Assets   Accumulated Benefit Obligation Exceeds the Fair Value of Plan Assets 2018   2017   2018   2017 U.S. Pension Benefits:               Projected benefit obligation $ 45,333   $ 37,113   $ 45,333   $ 37,113 Accumulated benefit obligation 44,284   35,538   44,284   35,538 Fair value of plan assets 39,554   32,914   39,554   32,914 International Pension Benefits:               Projected benefit obligation $ 630   $ 1,138   $ 630   $ 647 Accumulated benefit obligation 539   992   539   549 Fair value of plan assets 339   798   339   342
Fair Values of U.S. Pension and Postretirement Benefit Plan Assets by Asset Category as Well as the Percentage That Each Category Comprises of Total Plan Assets and the Respective Target Allocations	The fair values of U.S. and international pension and postretirement benefit plan assets by asset category as of December 31, 2018 are presented below (in millions), as well as the percentage that each category comprises of our total plan assets and the respective target allocations.   Total Assets(1)   Level 1   Level 2   Level 3   Percentage of Plan Assets   Target Allocation Asset Category (U.S. Plans):                       Cash and cash equivalents $ 157   $ 108   $ 49   $ —   0.4 %   1-5 Equity Securities:                       U.S. Large Cap 5,276   2,155   3,121   —         U.S. Small Cap 542   386   156   —         Emerging Markets 1,859   1,436   423   —         Global Equity 2,320   2,056   264   —         International Equity 3,670   2,189   1,481   —         Total Equity Securities 13,667   8,222   5,445   —   34.5   25-55 Fixed Income Securities:                       U.S. Government Securities 12,295   11,922   373   —         Corporate Bonds 4,303   —   4,301   2         Global Bonds 55   —   55   —         Municipal Bonds 16   —   16   —         Total Fixed Income Securities 16,669   11,922   4,745   2   42.1   35-55 Other Investments:                       Hedge Funds 3,154   —   1,185   —   8.0   5-15 Private Equity 2,763   —   —   —   7.0   1-10 Private Debt 836   —   178   —   2.1   1-10 Real Estate 1,989   152   53   —   5.0   1-10 Structured Products(2) 138   —   138   —   0.4   1-5 Risk Parity Funds 207   —   —   —   0.5   1-10 Total U.S. Plan Assets $ 39,580   $ 20,404   $ 11,793   $ 2   100.0 %     Asset Category (International Plans):                       Cash and cash equivalents $ 45   $ 4   $ 41   —   3.5   1-10 Equity Securities:                       Local Markets Equity 171   —   171   —         U.S. Equity 34   —   34   —         Emerging Markets 33   33   —   —         International / Global Equity 348   150   198   —         Total Equity Securities 586   183   403   —   45.6   30-60 Fixed Income Securities:                       Local Government Bonds 102   24   78   —         Corporate Bonds 195   54   141   —         Global Bonds 27   27     —         Total Fixed Income Securities 324   105   219   —   25.2   25-45 Other Investments:                       Real Estate 121   —   76   —   9.4   5-10 Other 208   —   191   4   16.3   1-20 Total International Plan Assets $ 1,284   $ 292   $ 930   $ 4   100.0 %     Total Plan Assets $ 40,864   $ 20,696   $ 12,723   $ 6         (1) Certain investments that are measured at fair value using the NAV per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy but are included in the category totals. (2) Represent mortgage and asset-backed securities. The fair values of U.S. and international pension and postretirement benefit plan assets by asset category as of December 31, 2017 are presented below (in millions), as well as the percentage that each category comprises of our total plan assets and the respective target allocations.   Total Assets(1)   Level 1   Level 2   Level 3   Percentage of Plan Assets   Target Allocation Asset Category (U.S. Plans):                       Cash and cash equivalents(2) $ 5,725   $ 5,292   $ 433   $ —   13.6 %   0-5 Equity Securities:                       U.S. Large Cap 5,924   3,121   2,803   —         U.S. Small Cap 591   421   170   —         Emerging Markets 2,101   1,669   432   —         Global Equity 2,817   2,400   417   —         International Equity 4,791   2,950   1,841   —         Total Equity Securities 16,224   10,561   5,663   —   38.5   35-55 Fixed Income Securities:                       U.S. Government Securities 7,695   7,323   372   —         Corporate Bonds 3,865   —   3,857   8         Global Bonds 53   —   53   —         Municipal Bonds 21   —   21   —         Total Fixed Income Securities 11,634   7,323   4,303   8   27.6   25-35 Other Investments:                       Hedge Funds 2,910   —   1,031   —   6.9   5-15 Private Equity 2,107   —   —   —   5.0   1-10 Private Debt 953   —   237   —   2.3   1-10 Real Estate 2,031   157   139   —   4.8   1-10 Structured Products(3) 172   —   172   —   0.4   0-5 Risk Parity Funds 359   —   —   —   0.9   1-10 Total U.S. Plan Assets $ 42,115   $ 23,333   $ 11,978   $ 8   100.0 %     Asset Category (International Plans):                       Cash and cash equivalents $ 78   $ 43   $ 35   —   5.8   0-10 Equity Securities:                       Local Markets Equity 213   —   213   —         U.S. Equity 30   —   30   —         Emerging Markets 38   38   —   —         International / Global Equity 356   166   190   —         Total Equity Securities 637   204   433   —   47.7   30-60 Fixed Income Securities:                       Local Government Bonds 103   25   78   —         Corporate Bonds 198   59   139   —         Total Fixed Income Securities 301   84   217   —   22.6   25-50 Other Investments:                       Real Estate 124   —   79   —   9.3   5-10 Other 193   —   184   —   14.6   0-20 Total International Plan Assets $ 1,333   $ 331   $ 948   $ —   100.0 %     Total Plan Assets $ 43,448   $ 23,664   $ 12,926   $ 8         (1) Certain investments that are measured at fair value using the NAV per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy but are included in the category totals. (2) Includes $5 billion in contributions made in December 2017 that had not yet been invested according to the targeted allocations. (3) Represents mortgage and asset-backed securities.
Fair Value Measurement of Plan Assets Using Significant Unobservable Inputs (Level 3)	The following table presents the changes in the Level 3 instruments measured on a recurring basis for the years ended December 31, 2018 and 2017 (in millions).   Corporate Bonds   Other   Total Balance on January 1, 2017 $ —   $ —   $ — Actual Return on Assets:           Assets Held at End of Year —   —   — Assets Sold During the Year —   —   — Purchases 9   —   9 Sales (1 )   —   (1 ) Transfers Into (Out of) Level 3 —   —   — Balance on December 31, 2017 $ 8   $ —   $ 8 Actual Return on Assets:           Assets Held at End of Year —   —   — Assets Sold During the Year (7 )   —   (7 ) Purchases 11   9   20 Sales (10 )   (5 )   (15 ) Transfers Into (Out of) Level 3 —   —   — Balance on December 31, 2018 $ 2   $ 4   $ 6
Expected Cash Flows for Pension and Postretirement Benefit Plans	Information about expected cash flows for the pension and postretirement benefit plans is as follows (in millions):   U.S. Pension Benefits   U.S. Postretirement Medical Benefits   International Pension Benefits Expected Employer Contributions:           2019 to plan trusts $ 2,000   $ 192   $ 63 2019 to plan participants 20   74   5 Expected Benefit Payments:           2019 $ 1,505   $ 227   $ 29 2020 1,652   233   32 2021 1,788   227   36 2022 1,930   218   41 2023 2,075   209   46 2024 - 2028 12,550   912   319
schedule of one basis point change in discount rate on the projected benefit obligation [Table Text Block]	As of December 31, 2018, the impact of each basis point change in the discount rate on the projected benefit obligation of the pension and postretirement medical benefit plans is as follows (in millions):   Increase (Decrease) in the Projected Benefit Obligation   Pension Benefits   Postretirement Medical Benefits One basis point increase in discount rate $ (69 )   $ (2 ) One basis point decrease in discount rate 73   2