GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

9 Months Ended

Sep. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

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

In millions
	North America		International		Total
Balance as of December 31, 2020	$	2,448.8	$	370.5	$	2,819.3
Divestiture	—		(6.0)		(6.0)
Changes due to foreign currency fluctuations	—		(14.0)		(14.0)
Balance as of September 30, 2021	$	2,448.8	$	350.5	$	2,799.3

Intangible Assets

Intangible assets were as follows:

In millions
	September 30, 2021						December 31, 2020
	Gross Carrying Amount		Accumulated Amortization		Net Value		Gross Carrying Amount		Accumulated Amortization		Net Value
Amortizable intangibles:
Customer relationships	$	1,293.8	$	704.1	$	589.7	$	1,314.9	$	630.2	$	684.7
Covenants not-to-compete	3.5		3.2		0.3		3.5		3.0		0.5
Tradenames	3.6		1.3		2.3		3.6		1.3		2.3
Operating permits	13.4		9.6		3.8		11.5		6.5		5.0
Other	0.6		0.6		—		0.6		0.6		—
Indefinite lived intangibles:
Operating permits	75.6		—		75.6		79.6		—		79.6
Tradenames	314.4		—		314.4		315.3		—		315.3
Total	$	1,704.9	$	718.8	$	986.1	$	1,729.0	$	641.6	$	1,087.4

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, 2020	$	1,087.4
Divestiture	(5.9)
Amortization during the period	(89.1)
Changes due to foreign currency fluctuations	(6.3)
Balance as of September 30, 2021	$	986.1

Estimated Amortization Expense

The estimated amortization expense for each of the next five years (based upon exchange rates at September 30, 2021) is as follows for the years ending December 31:

In millions
2021 (remainder)	$	39.2
2022	115.8
2023	111.9
2024	110.6
2025	90.2