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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

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)	2018				2017
Finished goods	$	148.9			$	119.6
Work-in-process	11.8				11.3
Raw materials and supplies	61.6				48.2
	$	222.3			$	179.1

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 capital lease 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)	2018				2017
Machinery and equipment	$	319.3			$	313.0
Land and buildings	328.5				315.5
Computer equipment and software	142.2				113.4
Furniture and fixtures	50.4				56.7
Construction in progress	52.4				63.2
Total property, plant, and equipment	892.8				861.8
Accumulated depreciation	(472.0		)		(428.3		)
Total property, plant and equipment, net	$	420.8			$	433.5

Changes in Accrued Sales Returns

The Company had the following activity for accrued sales returns from December 31, 2016 to December 31, 2018:

(in millions)
Balance as of December 31, 2016	$	30.3
Amounts accrued	81.6
Returns charged to accrual	(81.9		)
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

Warranty Activity

The Company had the following activity for warranties from December 31, 2016 to December 31, 2018:

(in millions)
Balance as of December 31, 2016	$	29.9
Amounts accrued	34.5
Warranties charged to accrual	(27.7		)
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

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