BUSINESS COMBINATIONS - Schedule of Net Assets Acquired (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Asset Acquisition [Line Items]
Cash paid at closing	$ 23
Accrued consideration	5	$ 1
Total net consideration	$ 28
Goodwill			$ 47
Acquisition A23
Asset Acquisition [Line Items]
Cash paid at closing			30
Cash deposited into escrow			5
Accrued consideration			3
Total net consideration			38
Cash and cash equivalents			0
Accounts receivable			6
Contract assets			1
Other current assets			0
Intangible assets			13
Goodwill			21
Other accrued liabilities			0
Contract liabilities			(3)
Net assets acquired			38
Acquisition B23
Asset Acquisition [Line Items]
Cash paid at closing			27
Cash deposited into escrow			0
Accrued consideration			5
Total net consideration			32
Cash and cash equivalents			1
Accounts receivable			7
Contract assets			2
Other current assets			0
Intangible assets			11
Goodwill			15
Other accrued liabilities			(2)
Contract liabilities			(2)
Net assets acquired			32
Other 2023 acquisitions
Asset Acquisition [Line Items]
Cash paid at closing			22
Cash deposited into escrow			0
Accrued consideration			2
Total net consideration			24
Cash and cash equivalents			0
Accounts receivable			0
Contract assets			0
Other current assets			1
Intangible assets			9
Goodwill			16
Other accrued liabilities			0
Contract liabilities			(2)
Net assets acquired			$ 24