Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Summary of Significant Accounting Policies

Schedule of change in the allowance for doubtful accounts

	2019		2018
	(in millions)
Balance at beginning of year	$	7.5	$	5.8
Provision charged to expense		16.9		20.2
Accounts written off, net of recoveries		(16.9)		(19.7)
Other		—		1.2
Balance at end of year	$	7.5	$	7.5

Schedule of estimated useful lives of property, plant and equipment

	Estimated Useful
Asset Category	Lives (Years)
Office and technical equipment	3 - 10
Computer equipment and software	3
Customer premise equipment	5
Vehicles	5
Telephony infrastructure	5 - 7
Headend equipment	7
Distribution facilities	10
Building and leasehold improvements	5 - 20