XML 26 R16.htm IDEA: XBRL DOCUMENT v3.25.3

Other noncurrent liabilities

9 Months Ended

Sep. 30, 2025

Other noncurrent liabilities

Other noncurrent liabilities

Note 9 – Other noncurrent liabilities:

​

​	​	​	​	​	​	​
​		December 31,			September 30,
​	​	2024		​	2025
​	​	(In millions)
Accrued development costs	​	$	26.8	​	$	24.3
Asset retirement obligations	​	​	14.3	​	​	16.7
Insurance claims and expenses	​		16.6	​		16.6
Operating lease liabilities	​	​	17.1	​	​	16.5
Deferred income	​	​	11.8	​	​	8.2
Other postretirement benefits	​		6.7	​		6.8
Employee benefits	​		4.5	​		4.8
Earn-out liability	​	​	4.3	​	​	—
Other	​		.6	​		.6
Total	​	$	102.7	​	$	94.5

​

See Notes 17 and 18 for additional details related to the acquisition earn-out liability.

X

- References

No definition available.

+ Details

Name:	us-gaap_OtherLiabilitiesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The entire disclosure for other liabilities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(24))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 405
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/405/tableOfContent

+ Details

Name:	us-gaap_OtherLiabilitiesDisclosureTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration