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1. Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Schedule of Product Warranty Liability

Warranty liabilities are included in Other current liabilities and Other long-term liabilities in the Consolidated Balance Sheets. Change in our warranty liability were as follows (in millions):

						2020						2019						2018
January 1						$	9.0					$	10.1					$	18.7
Provision for warranty						9.4						9.9						25.5
Actual warranty costs						(8.6)						(11.0)						(34.1)
December 31						$	9.8					$	9.0					$	10.1

Schedule of Weighted Average Number of Shares

The weighted average number of common shares outstanding used to calculate basic and diluted earnings per share, and the anti-dilutive shares that are excluded from the diluted earnings per share calculation are as follows (in thousands):

						Year Ended December 31,
						2020						2019						2018
Basic weighted average shares outstanding						29,768						29,843						29,836
Effect of potentially dilutive stock options
and restricted stock awards						392						341						392
Diluted weighted average common shares						30,160						30,184						30,228
Anti-dilutive stock options and restricted stock awards
excluded from the computation of diluted EPS						44						98						84

Accounts Receivable, Allowance for Credit Loss

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

December 31,			2020			2019			2018
Beginning balance			$	20.2		$	26.7		$	25.5
Provision for expected credit losses (2020), bad debt (reversal) expense (2019 and 2018)			1.2			(1.2)			3.9
Write-offs charged against the allowance			(1.6)			(6.6)			(2.7)
Recoveries collected			—			1.3			—
Ending balance			$	19.8		$	20.2		$	26.7

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Tabular disclosure of allowance for credit loss on accounts receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447

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Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
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Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit).

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