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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
3 Months Ended
Mar. 31, 2020
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS).  
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

8.          ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

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Changes in accumulated other comprehensive income (loss) by component, net of tax, for the three months ended March 31, 2020 are as follows:

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Accumulated

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Non-

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Other

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​

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Post-

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Qualified

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​

​

Comprehensive

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(In millions)

    

Pensions

    

Retirement

    

Plans

    

Other

    

Income (Loss)

 

Balance at December 31, 2019

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$

(51.9)

​

$

16.3

​

$

(0.4)

​

$

(0.9)

​

$

(36.9)

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Amortization of prior service cost

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​

(0.5)

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​

(0.6)

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​

(0.1)

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​

—

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​

(1.2)

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Amortization of net loss

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​

1.1

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​

0.1

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​

0.1

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​

—

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1.3

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Foreign currency exchange

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​

—

​

​

—

​

​

—

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​

(0.5)

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​

(0.5)

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Other adjustments

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​

—

​

​

—

​

​

—

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​

(0.2)

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​

(0.2)

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Balance at March 31, 2020

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$

(51.3)

​

$

15.8

​

$

(0.4)

​

$

(1.6)

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$

(37.5)

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Changes in accumulated other comprehensive income (loss) by component, net of tax, for the three months ended March 31, 2019 consisted of the following:

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Accumulated

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​

​

​

​

​

​

​

Non-

​

​

​

Other

​

​

​

​

​

Post-

​

Qualified

​

​

​

Comprehensive

​

(In millions)

    

Pensions

    

Retirement

    

Plans

    

Other

    

Income (Loss)

 

Balance at December 31, 2018

​

$

(55.8)

​

$

21.7

​

$

(0.1)

​

$

(0.3)

​

$

(34.5)

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Amortization of prior service cost

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​

(0.4)

​

​

(0.7)

​

​

—

​

​

—

​

​

(1.1)

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Amortization of net loss

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​

0.7

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​

0.2

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​

—

​

​

—

​

​

0.9

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Balance at March 31, 2019

​

$

(55.5)

​

$

21.2

​

$

(0.1)

​

$

(0.3)

​

$

(34.7)

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