Goodwill and Other Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets

Intangible assets with definite lives are generally amortized on a straight-line basis over the following lives:

	Useful Life in Years
Customer relationships	9-15
Non-competition agreements	1-5
Trade names	1-2
Internally developed and other purchased software	3-7

The carrying amount and accumulated amortization of other intangible assets as of December 31, 2020 and 2019 are as follows (in millions):

	December 31, 2020						December 31, 2019
	Gross				Net		Gross				Net
	Carrying		Accumulated		Carrying		Carrying		Accumulated		Carrying
	Amount		Amortization		Amount		Amount		Amortization		Amount
Customer relationships	$	48.0	$	(23.9)	$	24.1	$	48.0	$	(20.0)	$	28.0
Non-competition agreements	5.0		(4.8)		0.2		5.0		(4.4)		0.6
Trade names	3.8		(3.8)		—		3.8		(3.8)		—
Internally developed and other purchased software	45.3		(28.9)		16.4		42.0		(23.4)		18.6
Total other intangible assets	$	102.1	$	(61.4)	$	40.7	$	98.8	$	(51.6)	$	47.2

Schedule of Expected Amortization Expense

Estimated future amortization expense for intangible assets is as follows (in millions):

Year ending December 31,
2021	$	9.8
2022	8.9
2023	5.9
2024	4.6
2025	4.2
2026 and thereafter	7.3
Total	$	40.7