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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
6 Months Ended
Jun. 30, 2022
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 six months ended June 30, 2022 consisted of the following:

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​

​

​

​

​

​

​

​

​

​

​

​

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​

​

​

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Accumulated

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​

​

​

​

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Post-

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Non-

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​

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Other

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​

​

Pension

​

Retirement

​

Qualified

​

​

​

Comprehensive

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(In millions)

    

Benefits

    

Benefits

    

Plans

    

Other

    

Income (Loss)

 

Balance at December 31, 2021

​

$

(39.1)

​

$

10.1

​

$

(0.7)

​

$

(1.2)

​

$

(30.9)

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Amortization of prior service cost

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​

(0.2)

​

​

(0.7)

​

​

—

​

​

—

​

​

(0.9)

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Amortization of net loss

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​

0.6

​

​

0.2

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​

—

​

​

—

​

​

0.8

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Foreign currency exchange

​

​

—

​

​

—

​

​

—

​

​

0.3

​

​

0.3

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Balance at March 31, 2022

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​

(38.7)

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​

9.6

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​

(0.7)

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​

(0.9)

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​

(30.7)

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Amortization of prior service cost

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​

(0.2)

​

​

(0.7)

​

​

—

​

​

—

​

​

(0.9)

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Amortization of net loss

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​

0.7

​

​

0.2

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​

—

​

​

1.1

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​

2.0

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Foreign currency exchange

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​

—

​

​

—

​

​

—

​

​

(2.3)

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​

(2.3)

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Other adjustments

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​

—

​

​

—

​

​

—

​

​

0.4

​

​

0.4

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Balance at June 30, 2022

​

$

(38.2)

​

$

9.1

​

$

(0.7)

​

$

(1.7)

​

$

(31.5)

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​

Changes in accumulated other comprehensive income (loss) by component, net of tax, for the six months ended June 30, 2021 consisted of the following:

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​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

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Accumulated

​

​

​

​

​

​

Post-

​

Non-

​

​

​

Other

​

​

​

Pension

​

Retirement

​

Qualified

​

​

​

Comprehensive

​

(In millions)

    

Benefits

    

Benefits

    

Plans

    

Other

    

Income (Loss)

 

Balance at December 31, 2020

​

$

(61.7)

​

$

12.2

​

$

(0.6)

​

$

(0.7)

​

$

(50.8)

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Amortization of prior service cost

​

​

(0.4)

​

​

(0.7)

​

​

—

​

​

—

​

​

(1.1)

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Amortization of net loss

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​

0.9

​

​

0.2

​

​

0.1

​

​

—

​

​

1.2

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Foreign currency exchange

​

​

—

​

​

—

​

​

—

​

​

(0.2)

​

​

(0.2)

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Balance at March 31, 2021

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​

(61.2)

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​

11.7

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​

(0.5)

​

​

(0.9)

​

​

(50.9)

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Amortization of prior service cost

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​

(0.4)

​

​

(0.7)

​

​

(0.1)

​

​

—

​

​

(1.2)

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Amortization of net loss

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​

1.0

​

​

0.3

​

​

—

​

​

—

​

​

1.3

​

Foreign currency exchange

​

​

—

​

​

—

​

​

—

​

​

(0.1)

​

​

(0.1)

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Other adjustments

​

​

—

​

​

—

​

​

—

​

​

0.2

​

​

0.2

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Balance at June 30, 2021

​

$

(60.6)

​

$

11.3

​

$

(0.6)

​

$

(0.8)

​

$

(50.7)

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​