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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Schedule of Inventory, Current

Inventories are stated at the lower of cost and net realizable value, determined by the first-in, first-out method and consist of the following:

			December 31,
(in millions)			2020						2019
Finished goods			$	170.2					$	157.4
Work-in-process			12.6						10.8
Raw materials and supplies			129.3						92.3
			$	312.1					$	260.5

Schedule of Property, Plant and Equipment

Property, plant and equipment are carried at cost at acquisition date and are depreciated using the straight-line method over their estimated useful lives as follows:

			Estimated Useful Lives (in years)
Buildings			25-30
Computer equipment and software			3-7
Leasehold improvements			4-7
Machinery and equipment			3-7
Office furniture and fixtures			5-7

The Company records depreciation and amortization in cost of sales for long-lived assets used in the manufacturing process, and within each line item of operating expenses for all other long-lived assets. Leasehold improvements are amortized over the shorter of the life of the lease or seven years. Assets under finance leases are included within property, plant and equipment and represent non-cash investing activities.

Property, plant and equipment, net consisted of the following:

			December 31,
(in millions)			2020						2019
Machinery and equipment			$	419.6					$	350.7
Land and buildings			359.7						317.8
Computer equipment and software			182.0						155.2
Furniture and fixtures			57.6						52.5
Construction in progress			72.0						65.0
Total property, plant and equipment			1,090.9						941.2
Accumulated depreciation			(583.0)						(505.4)
Total property, plant and equipment, net			$	507.9					$	435.8

Changes in Accrued Sales Returns

The Company had the following activity for accrued sales returns from December 31, 2018 to December 31, 2020:

(in millions)
Balance as of December 31, 2018			$	34.3
Amounts accrued			112.4
Returns charged to accrual			(107.4)
Balance as of December 31, 2019			39.3
Amounts accrued			111.9
Returns charged to accrual			(106.3)
Balance as of December 31, 2020			$	44.9

Warranty Activity

The Company had the following activity for its accrued warranty expense from December 31, 2018 to December 31, 2020:

(in millions)
Balance as of December 31, 2018			$	36.4
Amounts accrued			29.4
Warranties charged to accrual			(24.2)
Balance as of December 31, 2019			41.6
Amounts accrued			24.3
Warranties charged to accrual			(21.7)
Balance as of December 31, 2020			$	44.2

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

The Company had the following activity for its allowance for credit losses from December 31, 2018 to December 31, 2020.

(in millions)
Balance as of December 31, 2018			$	47.6
Amounts accrued			29.3
Write-offs charged against the allowance			(5.0)
Balance as of December 31, 2019			71.9
ASU 2016-13 adoption impact (before tax)			8.9
Balance as of January 1, 2020			80.8
Amounts accrued			35.8
Write-offs charged against the allowance			(45.0)
Balance as of December 31, 2020			$	71.6

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