Schedule II - Valuation Accounts and Reserves

12 Months Ended

Dec. 31, 2017

Schedule II - Valuation Accounts and Reserves [Abstract]

Schedule II - Valuation Accounts and Reserves

(Millions of dollars)	Balance at January 1		Charged to Expense	Deductions	Other 1	Balance at December 31
2017
Deducted from asset accounts:
Allowance for doubtful accounts	$	1.6	–	–	–	1.6
Deferred tax asset valuation allowance		305.4	18.6	–	152.3	476.3
2016
Deducted from asset accounts:
Allowance for doubtful accounts	$	1.6	–	–	–	1.6
Deferred tax asset valuation allowance		294.4	25.7	–	(14.7)	305.4
2015
Deducted from asset accounts:
Allowance for doubtful accounts	$	1.6	–	–	–	1.6
Deferred tax asset valuation allowance		306.5	40.8	–	(52.9)	294.4

1Amounts in 2017 and 2016 for deferred tax asset valuations are primarily associated with an increase in foreign tax credit carryforwards.  The amount in 2015 for deferred tax asset valuation allowance is primarily associated with utilization of foreign tax credit carryforwards.