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RESTRUCTURING - Additional Information (Details) - Chubb Restructuring Program - USD ($) $ in Millions	12 Months Ended		24 Months Ended
	Dec. 31, 2025	Dec. 31, 2023	Dec. 31, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring costs		$ 9	$ 67
Forecast
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 125
Other Accrued Liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring liabilities		32	$ 32
Safety Services
Restructuring Cost and Reserve [Line Items]
Restructuring costs		$ 37

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