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RETIREMENT BENEFIT PLANS - Net Benefit Costs (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Pension benefits | US    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 0 $ 0
Interest cost 1 1
Expected return on plan assets (3) (3)
Amortization of unrecognized prior service credit 0 0
Amortization of unrecognized loss 1 1
Net periodic benefit (income) cost (1) (1)
Pension benefits | Non-US    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 6 5
Interest cost 8 2
Expected return on plan assets (21) (6)
Amortization of unrecognized prior service credit 0 0
Amortization of unrecognized loss 3 3
Net periodic benefit (income) cost (4) 4
Other postretirement employee benefits    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 0 0
Interest cost 0 1
Expected return on plan assets 0 0
Amortization of unrecognized prior service credit 0 (1)
Amortization of unrecognized loss 0 0
Net periodic benefit (income) cost $ 0 $ 0