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EMPLOYEE BENEFIT PLANS - Pension and Retirements Expenses (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Multiemployer Plans [Line Items]
Service cost	$ 8	$ 8
Non-service pension benefit	(17)	(39)
Total net periodic benefit (income) cost	(7)	(11)
UTC Sponsored Defined Benefit Plans
Multiemployer Plans [Line Items]
Service cost	0	4
Non-service pension benefit	(2)	(20)
Total net periodic benefit (income) cost	$ (2)	$ (16)

X

- Definition

Amount of net periodic benefit cost (credit) for defined benefit plan.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 6
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X

- Definition

Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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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.

+ References

No definition available.

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X

- Definition

Amount of expense (reversal of expense) for net periodic benefit cost components, excluding service cost component, of defined benefit plan. Amount includes, but is not limited to, interest cost, expected (return) loss on plan asset, amortization of prior service cost (credit), amortization of (gain) loss, amortization of transition (asset) obligation, settlement (gain) loss, curtailment (gain) loss and certain termination benefits.

+ References

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-Section 45
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