RETIREMENT BENEFIT PLANS - Narrative (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2020 EUR (€)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined contribution expense	$ 38		$ 37	$ 35
Contribution amount	137	€ 100
Pension settlement loss	4		27	$ 0
Payments for contractual obligation	$ 6
Health care cost trend rate assumed for next fiscal year	6.50%
Ultimate health care cost trend rate	4.75%
Minimum
Defined Benefit Plan Disclosure [Line Items]
Future employer contributions	$ 20
Maximum
Defined Benefit Plan Disclosure [Line Items]
Future employer contributions	30
Pension benefits
Defined Benefit Plan Disclosure [Line Items]
Amortization of net losses expected in next year	17
Pension benefits | United States
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, benefit obligation, payment for settlement			50
Liquidation of plan assets			50
Defined benefit plan, benefit obligation, benefits paid	15		15
Pension benefits | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, benefit obligation, benefits paid	36		16
Pension benefits | Former Employees | United States
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, benefit obligation, benefits paid			15
Decrease in benefit obligation			65
Pension settlement loss			27
Other postretirement employee benefits
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, benefit obligation, benefits paid	8		$ 12
Amortization of net losses expected in next year	1
Amortization of net prior service cost expected in the next year	$ 3