RETIREMENT BENEFITS - Schedule Of Defined Benefit Obligations And Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Change in Fair Value of Plan Assets
Fair value of plan assets at beginning of year	$ 2,807
Employer contributions	87	$ 96	$ 63
Fair value of plan assets at end of year	2,815	2,807
Other non-current assets	317	208
Other non-current liabilities	(654)	(899)
Pension Plans, Defined Benefit
Defined Benefit Plan, Change in Benefit Obligation
Benefit obligations at beginning of year	3,242	2,940
Service cost—benefits earned during the year	51	48	26
Interest cost on projected benefit obligation	35	42	115
Settlements and Curtailments	(101)	(145)
Actuarial (gains)/losses	(153)	233
Benefits paid	(46)	(58)
Foreign currency and other	(93)	182
Benefit obligations at end of year	2,935	3,242	2,940
Defined Benefit Plan, Change in Fair Value of Plan Assets
Fair value of plan assets at beginning of year	2,807	2,536
Actual return on plan assets	125	196
Employer contributions	87	96
Settlements	(83)	(126)
Benefits paid	(46)	(58)
Foreign currency and other	(75)	163
Fair value of plan assets at end of year	2,815	2,807	$ 2,536
Funded status	(120)	(435)
Other non-current assets	317	208
Other current liabilities	(24)	(26)
Other non-current liabilities	(413)	(617)
Funded status	(120)	(435)
Net actuarial losses	1,015	1,255
Prior service credit	(29)	(22)
Total	$ 986	$ 1,233