FINANCIAL INSTRUMENTS - Schedule of notional amounts of outstanding derivatives (Details) $ in Millions	Mar. 31, 2026 USD ($)
Less than 1 year \| USD \| Sold currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 522
Less than 1 year \| USD \| Purchased currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	118
Less than 1 year \| CHF \| Sold currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	57
Less than 1 year \| CHF \| Purchased currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	148
Less than 1 year \| CZK \| Sold currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	2
Less than 1 year \| CZK \| Purchased currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	83
Less than 1 year \| Other currencies \| Sold currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	8
Less than 1 year \| Other currencies \| Purchased currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	9
Less than 1 year \| Metal \| Derivatives that do not qualify for hedge accounting
Derivatives, Fair Value [Line Items]
Derivative, notional amount	417
Less than 1 year \| Natural gas \| Derivatives that do not qualify for hedge accounting
Derivatives, Fair Value [Line Items]
Derivative, notional amount	27
Over 1 year \| USD \| Sold currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	273
Over 1 year \| USD \| Purchased currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	11
Over 1 year \| CHF \| Sold currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	10
Over 1 year \| CHF \| Purchased currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	19
Over 1 year \| CZK \| Sold currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	0
Over 1 year \| CZK \| Purchased currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	11
Over 1 year \| Other currencies \| Sold currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	0
Over 1 year \| Other currencies \| Purchased currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	0
Over 1 year \| Metal \| Derivatives that do not qualify for hedge accounting
Derivatives, Fair Value [Line Items]
Derivative, notional amount	(1)
Over 1 year \| Natural gas \| Derivatives that do not qualify for hedge accounting
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 27

Less than 1 year | USD | Sold currencies