Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

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)	2019		2018
Finished goods	$	157.4	$	148.9
Work-in-process	10.8		11.8
Raw materials and supplies	92.3		61.6
	$	260.5	$	222.3

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)	2019			2018
Machinery and equipment	$	350.7		$	319.3
Land and buildings	317.8			328.5
Computer equipment and software	155.2			142.2
Furniture and fixtures	52.5			50.4
Construction in progress	65.0			52.4
Total property, plant, and equipment	941.2			892.8
Accumulated depreciation	(505.4		)	(472.0		)
Total property, plant and equipment, net	$	435.8		$	420.8

Changes in Accrued Sales Returns

The Company had the following activity for accrued sales returns from December 31, 2017 to December 31, 2019:

(in millions)
Balance as of December 31, 2017	$	30.0
Reclassification and remeasurement of sales return asset under Topic 606	1.7
Balance as of January 1, 2018	31.7
Amounts accrued	83.8
Returns charged to accrual	(81.2		)
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

Warranty Activity

The Company had the following activity for its accrued warranty expense from December 31, 2017 to December 31, 2019:

(in millions)
Balance as of December 31, 2017	$	36.7
Remeasurement of obligations under Topic 606	2.8
Balance as of January 1, 2018	39.5
Amounts accrued	21.9
Warranties charged to accrual	(25.0		)
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