GOODWILL AND INTANGIBLE ASSETS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Goodwill, balance at beginning of year	$ 6,873	$ 6,619
Goodwill acquired during the year	228	247	$ 43
Adjustments to goodwill	(6)	7
Goodwill, balance at end of year	7,095	6,873	$ 6,619
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Intangible assets, gross excluding goodwill	2,070	1,967
Accumulated amortization, intangible assets	(903)	(800)
Total intangible assets, net	1,167	1,167
Future amortization expense
2022	105
2023	103
2024	100
2025	98
2026	93
Thereafter	432
Total	931
Intangible Assets Not Subject to Amortization - Tradenames
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Intangible assets, gross excluding goodwill	235	235
Total intangible assets, net	235	235
Intangible Assets Not Subject to Amortization - Other
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Intangible assets, gross excluding goodwill	1	1
Total intangible assets, net	$ 1	1
Customer Relationships
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted average amortization period	17 years
Intangible assets, gross excluding goodwill	$ 1,581	1,479
Accumulated amortization, intangible assets	(726)	(638)
Total intangible assets, net	$ 855	841
Non-compete Agreements
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted average amortization period	9 years
Intangible assets, gross excluding goodwill	$ 3	3
Accumulated amortization, intangible assets	(2)	(2)
Total intangible assets, net	$ 1	1
Technology
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted average amortization period	14 years
Intangible assets, gross excluding goodwill	$ 141	141
Accumulated amortization, intangible assets	(74)	(65)
Total intangible assets, net	$ 67	76
Other Intangible Assets, Subject To Amortization
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted average amortization period	5 years
Intangible assets, gross excluding goodwill	$ 109	108
Accumulated amortization, intangible assets	(101)	(95)
Total intangible assets, net	$ 8	13
Total Amortizing Intangible Assets
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted average amortization period	17 years
Intangible assets, gross excluding goodwill	$ 1,834	1,731
Accumulated amortization, intangible assets	(903)	(800)
Total intangible assets, net	$ 931	$ 931