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RETIREMENT BENEFIT PLANS - Narrative (Details) £ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 GBP (£) | Dec. 31, 2019 USD ($) | Dec. 31, 2021 GBP (£)
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined contribution expense | $ 58 | $ 38 |  | $ 37 |
Contribution amount |  | 137 | £ 100 |  |
Payments for contractual obligation | $ 7 |  |  |  |
Health care cost trend rate assumed for next fiscal year | 6.25% |  |  |  | 6.25%
Ultimate health care cost trend rate | 4.75% |  |  |  | 4.75%
Minimum |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Future employer contributions | $ 20 |  |  |  |
Maximum |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Future employer contributions | 30 |  |  |  |
United States | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined benefit plan, plan assets, amount | 177 | 187 |  |  |
United States | Fair Value, Recurring | Cash |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined benefit plan, plan assets, amount | 1 |  |  |  |
United States | Fair Value, Recurring | Fair Value, Inputs, Level 1 |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined benefit plan, plan assets, amount | 1 | 20 |  |  |
United States | Valuation, Market Approach | Fair Value, Recurring | Fair Value, Inputs, Level 1 | Cash |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined benefit plan, plan assets, amount | 1 |  |  |  |
Non-U.S. | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined benefit plan, plan assets, amount | 2,049 | 2,041 |  |  |
Non-U.S. | Fair Value, Recurring | Cash |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined benefit plan, plan assets, amount | 338 | 130 |  |  |
Non-U.S. | Fair Value, Recurring | Fair Value, Inputs, Level 1 |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined benefit plan, plan assets, amount | 941 | 181 |  |  |
Non-U.S. | Valuation, Market Approach | Fair Value, Recurring | Fair Value, Inputs, Level 1 | Cash |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined benefit plan, plan assets, amount | 338 | 130 |  |  | £ 122
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 | 11 | 15 |  |  |
Defined benefit plan, plan assets, amount | 177 | 187 |  | 176 |
Pension benefits | Non-U.S. |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined benefit plan, benefit obligation, benefits paid | 76 | 36 |  |  |
Defined benefit plan, plan assets, amount | 2,049 | 2,041 |  | 505 |
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 |
Cash settlement loss |  |  |  | $ 27 |
Other postretirement employee benefits |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined benefit plan, benefit obligation, benefits paid | $ 6 | $ 8 |  |  |

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