RETIREMENT BENEFITS PLANS - Benefits Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Total expense (income)	$ 66		$ 165
Pension plans | United States
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	37	$ 97	91
Interest cost	70	103	138
Expected return on plan assets	(223)	(231)	(235)
Amortization	36	102	62
Benefit plans	(80)	71	56
Settlements, curtailments and special termination benefits	65	62	48
Total expense (income)	(15)	133	104
Pension plans | Foreign Plan
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	72	73	58
Interest cost	40	45	57
Expected return on plan assets	(120)	(109)	(106)
Amortization	71	60	38
Benefit plans	63	69	47
Settlements, curtailments and special termination benefits	17	10	14
Total expense (income)	80	79	61
Other postretirement benefits plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Service cost	1	2	2
Interest cost	6	9	14
Expected return on plan assets	0	0	(2)
Amortization	(5)	(13)	(14)
Benefit plans	2	(2)	0
Settlements, curtailments and special termination benefits	(1)	0	0
Total expense (income)	1	$ (2)	0
Automotive Fluid Conveyance Business | Pension plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Settlements, curtailments and special termination benefits			$ 8
Hydraulics Business | Pension plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Settlements, curtailments and special termination benefits	$ 13