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RETIREMENT BENEFIT PLANS - Narrative (Details) £ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 GBP (£) | Dec. 31, 2020 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined contribution expense | $ 59 | $ 58 |  | $ 38
Contribution amount |  | $ 137 | £ 100 |
Payments for contractual obligation | $ 7 |  |  |
Health care cost trend rate assumed for next fiscal year | 6.50% |  |  |
Defined Benefit Plan, 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 |  |  |

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- Definition Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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