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ACQUISITIONS - Additional Information (Details) € in Millions, $ in Millions			3 Months Ended	9 Months Ended	12 Months Ended
	Jul. 07, 2025 EUR (€)	Mar. 18, 2025 EUR (€)	Sep. 30, 2025 USD ($)	Sep. 30, 2025 USD ($) business	Dec. 31, 2024 USD ($) business	Jul. 01, 2025 USD ($)
Inspection Technologies
Business Combination [Line Items]
Interest acquired, percentage						100.00%
Net assets acquired \| $						$ 1,788
Number of completed acquisitions				2,000,000
Inspection Technologies \| Selling, general and administrative expenses
Business Combination [Line Items]
Acquisition related expense \| $			$ 9	$ 44
Frauscher Sensor Technology Group GmbH
Business Combination [Line Items]
Business combination, consideration transferred \| €	€ 675
Dellner Couplers
Business Combination [Line Items]
Business combination, consideration transferred \| €		€ 890
Strategic Acquisitions
Business Combination [Line Items]
Business combination, consideration transferred \| $					$ 168
Number of businesses acquired					4
Strategic Acquisitions \| Freight Segment \| Components Product Line
Business Combination [Line Items]
Number of businesses acquired					1
Strategic Acquisitions \| Freight Segment \| Digital Electronics Product Line
Business Combination [Line Items]
Number of businesses acquired					1
Strategic Acquisitions \| Transit Segment
Business Combination [Line Items]
Number of businesses acquired					2