1. Basis of Presentation and Use of Estimates Basis of Presentation and Use of Estimates (Tables)

3 Months Ended

Mar. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Revenue from External Customers by Geographic Areas [Table Text Block]

The following table presents our revenues disaggregated by geographic region based primarily on the location of the use of the product or service (in millions, unaudited):

	Three Months Ended
	March 31,
	2020		2019
Europe	$	195.7	$	185.9
Asia	111.4		106.4
United States	229.5		226.1
Other (primarily Canada and Latin America)	35.0		35.6
Total net sales	$	571.6	$	554.0

Schedule of Product Warranty Liability [Table Text Block]

Warranty liabilities are included in Other current liabilities and Other long-term liabilities in the Condensed Consolidated Balance Sheets. Change in our warranty liability for the three month period ended March 31, 2020 and 2019 were as follows (in millions):

	Three Months Ended
	March 31,
	2020			2019
Balance at beginning of period	$	9.0		$	10.1
Provision for warranty	1.9			1.4
Actual warranty costs	(2.7		)	(2.2		)
Balance at end of period	$	8.2		$	9.3

Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block]

Allowance for Doubtful Accounts

In our evaluation of bad debt allowances, we have considered past events, current conditions and reasonable and supportable forecasts about the future. We have considered what, if any, differences in future economic conditions are anticipated from our historical loss experience and based on current economic conditions to result in our required allowance for doubtful accounts as of March 31, 2020, while reflecting that our account receivable portfolio is heavily current in nature.

The adjustments made to historical loss experience reflect current differences in asset-specific risk characteristics, including, for example, accounts receivable by customer type (public or government entity versus private entity) and by geographic location of customer.

Components of our allowance for doubtful accounts were as follows (in millions):

December 31, 2019	$	20.2
Provision for expected credit losses	(0.9		)
Write-offs charged against the allowance	(0.5		)
Recoveries collected	0.1
March 31, 2020	$	18.9