Schedule II - Valuation Accounts and Reserves

12 Months Ended

Dec. 31, 2020

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
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
2018
Deducted from asset accounts:
Allowance for doubtful accounts	$	1.6	—	—	—	1.6
Deferred tax asset valuation allowance	407.3		3.3	—	(243.7)	166.9

1 The amounts in 2019 and 2018 for deferred tax asset valuation allowance are primarily associated with utilization of foreign tax credit carryforwards.