Schedule II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2020

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Schedule of Valuation and Qualifying Accounts

Schedule II - Valuation and Qualifying Accounts

($ in millions)	Balance at beginning of period		Charged to costs and expenses (1)		Deductions (2)		Balance at end of period
For the year ended December 31, 2020
Allowances deducted from assets:
Deferred tax asset valuation allowance	$	15.9	$	—	$	(0.8)	$	15.1
Allowance for doubtful accounts	0.5		0.7		(0.1)		1.1
Total allowances deducted from assets	$	16.4	$	0.7	$	(0.9)	$	16.2
For the year ended December 31, 2019
Allowances deducted from assets:
Deferred tax asset valuation allowance	$	16.0	$	—	$	(0.1)	$	15.9
Allowance for doubtful accounts	2.0		0.1		(1.6)		0.5
Total allowances deducted from assets	$	18.0	$	0.1	$	(1.7)	$	16.4
For the year ended December 31, 2018
Allowances deducted from assets:
Deferred tax asset valuation allowance	$	20.9	$	(3.0)	$	(1.9)	$	16.0
Allowance for doubtful accounts	0.5		0.7		0.8		2.0
Total allowances deducted from assets	$	21.4	$	(2.3)	$	(1.1)	$	18.0

(1)Included within the allowance for doubtful accounts activity is the effect of the modified retrospective application of a new accounting standard mentioned in Note 2.

(2)Includes accounts receivable written off, the write-off or write-down of valuation allowances, and translation adjustments.