GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

6 Months Ended

Jun. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Changes in the carrying amount of goodwill by reportable segment were as follows:

In millions
	Domestic and Canada RWCS			International RWCS			All Other		Total
Balance as of December 31, 2018	$	2,848.4		$	373.8		$	-	$	3,222.2
Goodwill acquired during period		-			-			-		-
Valuation adjustments from prior year acquisitions		(3.6	)		-			-		(3.6	)
Impairment during the period		-			(20.9	)		-		(20.9	)
Divestiture of business		-			(6.2	)		-		(6.2	)
Changes due to foreign currency fluctuations		5.1			(1.5	)		-		3.6
Balance as of June 30, 2019	$	2,849.9		$	345.2		$	-	$	3,195.1

Summary of Accumulated Non-Cash Impairment Charges by Segment

Accumulated non-cash goodwill impairment charges by reportable segment were as follows:

In millions
	June 30, 2019		December 31, 2018
International RWCS	$	158.3	$	137.4
All Other		286.3		286.3
Total	$	444.6	$	423.7

Intangible Assets

Intangible assets were as follows:

In millions
	June 30, 2019						December 31, 2018
	Gross Carrying Amount		Accumulated Amortization		Net Value		Gross Carrying Amount		Accumulated Amortization		Net Value
Amortizable intangibles:
Customer relationships	$	1,589.5	$	563.9	$	1,025.6	$	1,591.5	$	492.0	$	1,099.5
Covenants not-to-compete		5.1		3.6		1.5		5.1		3.2		1.9
Tradenames		4.1		1.2		2.9		3.9		1.2		2.7
Other		12.3		4.0		8.3		12.3		3.5		8.8
Indefinite lived intangibles:						-
Operating permits		211.5		-		211.5		212.5		-		212.5
Tradenames		313.0		-		313.0		312.3		-		312.3
Total	$	2,135.5	$	572.7	$	1,562.8	$	2,137.6	$	499.9	$	1,637.7

Changes in Carrying Amount of Intangible Assets

Changes in the carrying amount of intangible assets were as follows:

In millions
	Total
Balance as of December 31, 2018	$	1,637.7
Intangible assets acquired during the period		0.5
Valuation adjustments for prior year acquisitions		3.5
Divestiture of business		(5.7	)
Impairments during the period		(1.7	)
Amortization during the period		(74.7	)
Changes due to foreign currency fluctuations		3.2
Balance as of June 30, 2019	$	1,562.8

Estimated Amortization Expense

The estimated amortization expense for each of the next five years (based upon exchange rates at June 30, 2019) is as follows for the years ending December 31:

In millions
2019	$	144.6
2020	$	140.1
2021	$	135.9
2022	$	134.2
2023	$	131.7