FINANCIAL INSTRUMENTS - Schedule of notional amounts of outstanding derivatives (Details) $ in Millions	Jun. 30, 2026 USD ($)
Less than 1 year \| USD \| Sold currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 526
Less than 1 year \| USD \| Purchased currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	126
Less than 1 year \| CHF \| Sold currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	71
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	0
Less than 1 year \| CZK \| Purchased currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	68
Less than 1 year \| Other currencies \| Sold currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	9
Less than 1 year \| Other currencies \| Purchased currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	6
Less than 1 year \| Metal \| Derivatives that do not qualify for hedge accounting
Derivatives, Fair Value [Line Items]
Derivative, notional amount	401
Less than 1 year \| Natural gas \| Derivatives that do not qualify for hedge accounting
Derivatives, Fair Value [Line Items]
Derivative, notional amount	28
Over 1 year \| USD \| Sold currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	289
Over 1 year \| USD \| Purchased currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	2
Over 1 year \| CHF \| Sold currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	9
Over 1 year \| CHF \| Purchased currencies
Derivatives, Fair Value [Line Items]
Derivative, notional amount	17
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	0
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	5
Over 1 year \| Natural gas \| Derivatives that do not qualify for hedge accounting
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 29

Less than 1 year | USD | Sold currencies