Schedule II - Valuation Accounts and Reserves

12 Months Ended

Dec. 31, 2019

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
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
2017
Deducted from asset accounts:
Allowance for doubtful accounts	$	1.6	—	—	—		1.6
Deferred tax asset valuation allowance	236.4		18.6	—	152.3		407.3

¹  The amounts in 2019 and 2018 for deferred tax asset valuation allowance are primarily associated with utilization of foreign tax credit carryforwards. The amount in 2017 for deferred tax asset valuation are primarily associated with an increase in foreign tax credit carryforwards.