SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) country reporting_unit	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Long-Lived Assets [Line Items]
Net sales	$ 23,196	$ 20,752	$ 19,628
Countries where products are sold (more than) | country	160
Investments in associate companies	$ 860	788
Other postretirement benefits plans
Long-Lived Assets [Line Items]
Defined benefit plan, amortization period of gain (loss)	8 years
Aerospace Segment
Long-Lived Assets [Line Items]
Net sales	$ 3,413	$ 3,039	$ 2,648
Number of reporting units | reporting_unit	2
United States | Pension plans
Long-Lived Assets [Line Items]
Defined benefit plan, amortization period of gain (loss)	22 years
Non-United States plans | Pension plans
Long-Lived Assets [Line Items]
Defined benefit plan, amortization period of gain (loss)	10 years
Minimum
Long-Lived Assets [Line Items]
Defined benefit plan, accounting corridor for amortization of net actuarial gains (losses) (as a percent)	8.00%
Maximum
Long-Lived Assets [Line Items]
Defined benefit plan, accounting corridor for amortization of net actuarial gains (losses) (as a percent)	10.00%