Schedule II - Valuation Accounts and Reserves

12 Months Ended

Dec. 31, 2021

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

Schedule II - Valuation Accounts and Reserves

(Millions of dollars)	Balance at January 1		Charged to Expense	Deductions	Other 1	Balance at December 31
2021
Deducted from asset accounts:
Allowance for doubtful accounts	$	1.6	—	—	—	1.6
Deferred tax asset valuation allowance	106.4		4.8	—	—	111.2
2020
Deducted from asset accounts:
Allowance for doubtful accounts	$	1.6	—	—	—	1.6
Deferred tax asset valuation allowance	103.1		3.3	—	—	106.4
2019
Deducted from asset accounts:
Allowance for doubtful accounts	$	1.6	—	—	—	1.6
Deferred tax asset valuation allowance	166.9		10.9	—	(74.7)	103.1

1 The amount in 2019 for deferred tax asset valuation allowance is primarily associated with utilization of foreign tax credit carryforwards.