INTANGIBLE ASSETS AND GOODWILL (Tables)

12 Months Ended

Dec. 31, 2019

OTHER INTANGIBLE ASSETS AND GOODWILL [Abstract]

Schedule of Finite-Lived Intangible Assets [Table Text Block]

		As of December 31, 2019									As of December 31, 2018
	Remaining Weighted Average Useful Life	Gross Carrying Amount			Accumulated Amortization			Net			Gross Carrying Amount			Accumulated Amortization			Net
Waste, service and energy contracts	18 years	$	447		$	211		$	236		$	522		$	271		$	251
Customer relationships, permits and other	5 years	52			30			22			52			24			28
Intangible assets, net		$	499		$	241		$	258		$	574		$	295		$	279
Waste and service contracts (liability)	14 years	$	(72	)	$	(66	)	$	(6	)	$	(72	)	$	(64	)	$	(8	)

Finite-lived Intangible Assets Amortization Expense [Table Text Block]

The following table details the amount of amortization expense and contra-expense associated with our intangible assets and liabilities that was included in our consolidated statements of operations for each of the years indicated (in millions):

	Year Ended December 31,
	2019			2018			2017
Intangible assets, net	$	22		$	20		$	20
Waste and service contracts (contra-expense)	$	(2	)	$	(2	)	$	(2	)

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

The following table details the amount of estimated amortization expense and contra-expense associated with our intangible assets and liabilities expected to be included in our consolidated statements of operations for each of the years indicated as of December 31, 2019 (in millions):

	Year Ended December 31,
	2020		2021		2022		2023		2024
Intangible assets, net	21		20		20		18		15
Waste and service contracts (contra-expense)	(1	)	$	—	$	—	$	—	$	—

Schedule of Goodwill [Table Text Block]

Goodwill

The following table details the changes in carrying value of goodwill (in millions):

	Total
Balance at December 31, 2017	$	313
Goodwill related to acquisitions	8
Balance at December 31, 2018	321
Goodwill related to acquisitions	—
Balance at December 31, 2019	$	321