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Other noncurrent assets (Tables)
 9 Months Ended
Sep. 30, 2024
Other noncurrent assets  
Other noncurrent assets

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December 31, 

    

September 30, 

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2023

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2024

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(In millions)

Note receivables - OPA

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$

69.1

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$

74.2

Operating lease right-of-use assets

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22.7

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22.0

Pension asset

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8.1

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19.9

Land held for development

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19.4

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15.2

IBNR receivables

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13.4

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13.4

Restricted cash and cash equivalents

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32.4

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5.8

Other

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16.7

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23.0

Total

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$

181.8

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$

173.5

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