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Comprehensive Income (Loss) (Notes)
 12 Months Ended
Dec. 31, 2017
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]  
Comprehensive Income (Loss)
Comprehensive Income (Loss)
 

Other comprehensive income (loss), net of tax, information is presented below:
 
 
2017
 
2016
 
2015
Foreign currency translation
 
 
 
 
 
 
Balance at beginning of period
 
$
(3.6
)
 
$
(2.1
)
 
$
1.0

Other comprehensive income (loss)—foreign currency translation gain (loss)
 
4.7

 
(1.5
)
 
(3.1
)
Balance at end of period
 
$
1.1

 
$
(3.6
)
 
$
(2.1
)
Cash flow hedges
 
 
 
 
 
 
Balance at beginning of period
 
$
39.9

 
$
(44.8
)
 
$
(34.5
)
Other comprehensive income (loss):
 
 
 
 
 
 
Gains (losses) arising in period
 
(11.5
)
 
56.1

 
(64.2
)
Income tax expense (benefit)
 
—

 
6.2

 
(25.2
)
Gains (losses) arising in period, net of tax
 
(11.5
)
 
49.9

 
(39.0
)
Reclassification of losses (gains) to net income (loss) (a)
 
(6.1
)
 
39.1

 
47.7

Income tax (expense) benefit (c)
 
—

 
4.3

 
19.0

Net amount of reclassification of losses (gains) to net income (loss)
 
(6.1
)
 
34.8

 
28.7

Total other comprehensive income (loss), net of tax
 
(17.6
)
 
84.7

 
(10.3
)
Balance at end of period
 
$
22.3

 
$
39.9

 
$
(44.8
)
Unrealized holding gains on securities
 
 
 
 
 
 
Balance at beginning of period
 
$
—

 
$
—

 
$
0.4

Reclassification of gains (losses) to net income (loss)—income tax benefit (c)
 
—

 
—

 
0.4

Total other comprehensive income (loss), net of tax
 
—

 
—

 
(0.4
)
Balance at end of period
 
$
—

 
$
—

 
$
—

Pension and OPEB plans
 
 
 
 
 
 
Balance at beginning of period
 
$
(125.0
)
 
$
(166.4
)
 
$
(188.9
)
Other comprehensive income (loss):
 
 
 
 
 
 
Prior service credit (cost) arising in period
 
4.7

 
(8.3
)
 
(7.7
)
Gains (losses) arising in period
 
94.2

 
11.6

 
(60.8
)
Subtotal
 
98.9

 
3.3

 
(68.5
)
Income tax expense (benefit) (c)
 
—

 
0.4

 
(26.0
)
Gains (losses) arising in period, net of tax
 
98.9

 
2.9

 
(42.5
)
Reclassification to net income (loss):
 
 
 
 
 
 
Prior service costs (credits) (b)
 
(53.8
)
 
(54.8
)
 
(60.2
)
Actuarial (gains) losses (b)
 
6.3

 
97.9

 
165.0

Subtotal
 
(47.5
)
 
43.1

 
104.8

Income tax (expense) benefit (c)
 
—

 
4.6

 
39.8

Amount of reclassification to net income (loss), net of tax
 
(47.5
)
 
38.5

 
65.0

Total other comprehensive income (loss), net of tax
 
51.4

 
41.4

 
22.5

Balance at end of period
 
$
(73.6
)
 
$
(125.0
)
 
$
(166.4
)


(a)
Included in cost of products sold
(b)
Included in pension and OPEB expense (income)
(c)
Included in income tax expense (benefit)