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Accumulated Other Comprehensive (Loss) Income
 6 Months Ended
Jun. 30, 2017
Equity [Abstract]  
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive (Loss) Income
The following table presents the changes in the accumulated balances for each component of Accumulated other comprehensive (loss) income ("AOCI") for each period presented (in millions of dollars):
 
 
Quarter Ended
 
Six Months Ended
 
 
June 30,
 
June 30,
 
 
2017
 
2016
 
2017
 
2016
Salaried VEBA and defined benefit pension plan:
 
 
 
 
 
 
 
 
Beginning balance
 
$
(36.2
)
 
$
(30.5
)
 
$
(37.1
)
 
$
(31.3
)
Amortization of net actuarial loss1
 
0.2

 
0.1

 
0.4

 
0.2

Amortization of prior service cost1
 
1.2

 
1.0

 
2.4

 
2.0

Less: income tax expense2
 
(0.6
)
 
(0.4
)
 
(1.1
)
 
(0.8
)
Net amortization reclassified from AOCI to Net income
 
0.8

 
0.7

 
1.7

 
1.4

Translation impact on Canadian pension plan AOCI balance
 
—

 
—

 
—

 
0.1

Other comprehensive income, net of tax
 
0.8

 
0.7

 
1.7

 
1.5

Ending balance
 
$
(35.4
)
 
$
(29.8
)
 
$
(35.4
)
 
$
(29.8
)
 
 
 
 
 
 
 
 
 
 
 
Quarter Ended
 
Six Months Ended
 
 
June 30,
 
June 30,
 
 
2017
 
2016
 
2017
 
2016
Available for sale securities:
 
 
 
 
 
 
 
 
Beginning balance
 
$
0.9

 
$
(0.1
)
 
$
0.8

 
$
(0.1
)
Unrealized gain on available for sale securities
 
1.0

 
0.4

 
2.1

 
0.4

Less: income tax expense
 
(0.4
)
 
(0.1
)
 
(0.8
)
 
(0.1
)
Net unrealized gain on available for sale securities
 
0.6

 
0.3

 
1.3

 
0.3

Reclassification of unrealized gain upon sale of available for sale securities3
 
(0.7
)
 
—

 
(1.6
)
 
—

Less: income tax benefit2
 
0.3

 
—

 
0.6

 
—

Net unrealized gain reclassified from AOCI to Net income
 
(0.4
)
 
—

 
(1.0
)
 
—

Other comprehensive income, net of tax
 
0.2

 
0.3

 
0.3

 
0.3

Ending balance
 
$
1.1

 
$
0.2

 
$
1.1

 
$
0.2

 
 
 
 
 
 
 
 
 
Other:
 
 
 
 
 
 
 
 
Beginning balance
 
$
(0.1
)
 
$
(0.2
)
 
$
(0.4
)
 
$
(0.3
)
Unrealized (loss) gain
 
—

 
(0.1
)
 
0.3

 
0.1

Less: income tax expense
 
—

 
—

 
(0.1
)
 
(0.1
)
Net (loss) gain
 
—

 
(0.1
)
 
0.2

 
—

Loss reclassified from AOCI to Net income
 
0.1

 
—

 
0.3

 
—

Less: income tax expense2
 
—

 
—

 
(0.1
)
 
—

Net loss reclassified from AOCI to Net income
 
0.1

 
—

 
0.2

 
—

Other comprehensive income (loss), net of tax
 
0.1

 
(0.1
)
 
0.4

 
—

Ending balance
 
$
—

 
$
(0.3
)
 
$
—

 
$
(0.3
)
 
 
 
 
 
 
 
 
 
Total AOCI ending balance
 
$
(34.3
)
 
$
(29.9
)
 
$
(34.3
)
 
$
(29.9
)
________________
1 
Amounts reclassified out of AOCI relating to Salaried VEBA adjustments were included as a component of Net periodic postretirement benefit cost relating to Salaried VEBA.
2 
Income tax amounts reclassified out of AOCI were included as a component of Income tax provision.
3 
Amounts reclassified out of AOCI relating to sales of available for sale securities were included as a component of Other income (expense), net. We use the specific identification method to determine the amount reclassified out of AOCI.