GOODWILL AND OTHER INTANGIBLES - Identifiable Intangible Assets (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 73,000,000		$ 63,000,000
Accumulated Amortization	(63,000,000)		(54,000,000)
Net Intangible Assets	10,000,000		9,000,000
Amortization of Intangible Assets	0	$ 0
Customer relationships and lists
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	65,000,000		56,000,000
Accumulated Amortization	(56,000,000)		(48,000,000)
Net Intangible Assets	9,000,000		8,000,000
Software
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,000,000		3,000,000
Accumulated Amortization	(3,000,000)		(2,000,000)
Net Intangible Assets	1,000,000		1,000,000
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,000,000		4,000,000
Accumulated Amortization	(4,000,000)		(4,000,000)
Net Intangible Assets	$ 0		$ 0