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SUMMARY OF ACCOUNTING POLICIES - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Investments and Restricted Cash | $ 483 |  |  |  | $ 476 |  |  |  | $ 483 | $ 476 |
Allowance for doubtful account | 104 |  |  |  | 102 |  |  |  | 104 | 102 |
Provision for doubtful accounts expense |  |  |  |  |  |  |  |  | 133 | 116 | $ 121
Inventories | 404 |  |  |  | 342 |  |  |  | 404 | 342 |
Capitalized interest |  |  |  |  |  |  |  |  | 49 | 14 | 13
Net currency transaction gains and (losses), pre-tax |  |  |  |  |  |  |  |  | 3 | 5 | 7
Increase in income tax benefits |  |  |  |  |  |  |  |  | (2,238) | (1,705) | (2,498)
Other income |  |  |  |  |  |  |  |  | (11) | (2,236) | 420
Decrease in other financing activities |  |  |  |  |  |  |  |  | (3,287) | 3,140 | 1,565
Increase in operating activities |  |  |  |  |  |  |  |  | 1,479 | 6,473 | 7,430
Operating lease, future minimal payments | 1,637 |  |  |  |  |  |  |  | 1,637 |  |
Revenues | (18,829) | $ (15,978) | $ (15,750) | $ (15,315) | (16,931) | $ (14,928) | $ (14,629) | $ (14,418) | (65,872) | (60,906) | (58,363)
Costs and Expenses |  |  |  |  |  |  |  |  | 58,343 | 55,439 | $ 50,695
Adjustments |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Increase in income tax benefits |  |  |  |  |  |  |  |  | 71 |  |
Revenues |  |  |  |  |  |  |  |  | 709 | 720 |
Costs and Expenses |  |  |  |  |  |  |  |  | 709 | 0 |
Licenses |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Indefinite-lived intangible assets | 5 |  |  |  |  |  |  |  | 5 |  |
Trade Names |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Indefinite-lived intangible assets | $ 200 |  |  |  | $ 200 |  |  |  | $ 200 | $ 200 |
Change in Assumptions for Pension Plans |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net actuarial gains or losses in excess of market-related value of plan assets or the plans' projected benefit obligations |  |  |  |  |  |  |  |  | 10.00% |  |
Minimum |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Employee share-based awards, Vesting Period |  |  |  |  |  |  |  |  | 3 years |  |
Minimum | Other Intangible Assets |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets, estimated useful lives range, Minimum |  |  |  |  |  |  |  |  | 2 years |  |
Minimum | Capitalized software |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets, estimated useful lives range, Minimum |  |  |  |  |  |  |  |  | 7 years |  |
Minimum | Vehicles |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated useful lives range Minimum |  |  |  |  |  |  |  |  | 3 years |  |
Minimum | Aircraft |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated useful lives range Minimum |  |  |  |  |  |  |  |  | 12 years |  |
Minimum | Buildings |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated useful lives range Minimum |  |  |  |  |  |  |  |  | 20 years |  |
Minimum | Plant Equipment |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated useful lives range Minimum |  |  |  |  |  |  |  |  | 3 years |  |
Minimum | Technology equipment |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated useful lives range Minimum |  |  |  |  |  |  |  |  | 3 years |  |
Maximum |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Employee share-based awards, Vesting Period |  |  |  |  |  |  |  |  | 5 years |  |
Maximum | Other Intangible Assets |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets, estimated useful lives range, Minimum |  |  |  |  |  |  |  |  | 22 years |  |
Maximum | Vehicles |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated useful lives range Minimum |  |  |  |  |  |  |  |  | 15 years |  |
Maximum | Aircraft |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated useful lives range Minimum |  |  |  |  |  |  |  |  | 30 years |  |
Maximum | Buildings |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated useful lives range Minimum |  |  |  |  |  |  |  |  | 40 years |  |
Maximum | Plant Equipment |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated useful lives range Minimum |  |  |  |  |  |  |  |  | 20 years |  |
Maximum | Technology equipment |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated useful lives range Minimum |  |  |  |  |  |  |  |  | 5 years |  |

X
- Definition Maximum Percentage of Actuarial Gain or Loss in Excess of Greater of Projected Benefit Obligation or Market Related Value of Plan Assets + References No definition available. + Details
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