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Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations.

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Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due beyond one year or the operating cycle, whichever is longer. Alternate captions include income taxes payable, noncurrent.

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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from unrealized losses on foreign currency transactions.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax settlements. Including, but not limited to, domestic tax settlement, foreign tax settlement, state and local tax settlement, and other tax settlements.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Amount of tax liability from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act, classified as current.

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Amount of tax liability from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act, classified as noncurrent.

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Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns.

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INCOME TAXES - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
INCOME TAXES - Narrative (Details) $ in Millions	Sep. 30, 2020 USD ($)	Sep. 30, 2019	Sep. 30, 2020 USD ($)	Sep. 30, 2019	Apr. 03, 2020 USD ($) installment
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items]
Effective income tax rate reconciliation, percent	25.90%	25.80%	33.40%	18.30%
Effective income tax rate reconciliation, tax settlement, amount			$ 149
Effective income tax rate reconciliation, change in deferred tax assets valuation allowance			51
Effective income tax rate reconciliation, repatriation of foreign earnings, amount			46
Increase (decrease) in unrecognized tax benefits	$ (37)
Deferred tax assets, unrealized currency losses	27		27
United Technologies Corp
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items]
Tax cuts and jobs act, transition tax for accumulated foreign earnings, liability, noncurrent					$ 701
Unrecognized tax benefits, number of annual installments \| installment					6
Accrued Liabilities \| United Technologies Corp
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items]
Tax cuts and jobs act, transition tax for accumulated foreign earnings, liability, current					$ 68
Accrued income taxes, current					6
Other Noncurrent Liabilities \| United Technologies Corp
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items]
Accrued income taxes, noncurrent					$ 453
Maximum
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items]
Decrease in unrecognized tax benefits is reasonably possible	$ 15		$ 15