v3.26.1
Stockholders' equity (Tables)
6 Months Ended
Jun. 30, 2026
Stockholders' equity  
Schedule of changes in accumulated other comprehensive income (loss)

Three months ended

Six months ended

June 30, 

June 30, 

  ​ ​ ​

2025

  ​ ​ ​

2026

  ​ ​ ​

2025

  ​ ​ ​

2026

(In millions)

Accumulated other comprehensive income (loss) (net of tax and
  noncontrolling interest):

 

  ​

 

  ​

 

  ​

 

  ​

Marketable securities:

Balance at beginning and end of period

$

1.7

$

1.7

$

1.7

$

1.7

Currency translation:

 

  ​

 

  ​

 

  ​

 

  ​

Balance at beginning of period

$

(100.3)

$

(87.4)

$

(111.7)

$

(90.1)

Other comprehensive income (loss) arising during the period

 

9.5

 

(2.8)

 

20.9

 

(0.1)

Balance at end of period

$

(90.8)

$

(90.2)

$

(90.8)

$

(90.2)

Defined benefit pension plans:

 

  ​

 

  ​

 

  ​

 

  ​

Balance at beginning of period

$

(48.9)

$

(17.5)

$

(49.4)

$

(17.7)

Other comprehensive income:

 

  ​

 

  ​

 

  ​

 

  ​

Amortization of prior service cost and net losses
  included in net periodic pension cost

 

.4

 

.3

 

.9

 

.5

Balance at end of period

$

(48.5)

$

(17.2)

$

(48.5)

$

(17.2)

OPEB plans:

 

  ​

 

  ​

 

  ​

 

  ​

Balance at beginning of period

$

.1

$

.3

$

.2

$

.3

Other comprehensive loss:

 

  ​

 

  ​

 

  ​

 

  ​

Amortization of prior service credit and net losses 
  included in net periodic OPEB cost

 

 

(.1)

 

(.1)

 

(.1)

Balance at end of period

$

.1

$

.2

$

.1

$

.2

Total accumulated other comprehensive loss:

 

  ​

 

  ​

 

  ​

 

  ​

Balance at beginning of period

$

(147.4)

$

(102.9)

$

(159.2)

$

(105.8)

Other comprehensive income (loss)

 

9.9

 

(2.6)

 

21.7

 

.3

Balance at end of period

$

(137.5)

$

(105.5)

$

(137.5)

$

(105.5)