Accounts Payable and Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2022

Payables And Accruals [Abstract]

Schedule of Accounts Payable and Accrued Liabilities

	December 31,
	2021		2022
	(In millions)
Accounts payable:
Kronos	$	143.6	$	177.2
CompX		3.4		3.5
BMI/LandWell		5.3		18.7
Other		.4		—
Total	$	152.7	$	199.4
Current accrued liabilities:
Deferred income	$	125.8	$	110.7
Employee benefits		39.9		34.4
Accrued sales discounts and rebates		28.7		25.6
Interest		5.3		4.9
Operating lease liabilities		3.7		3.8
Environmental remediation and related costs		3.5		3.8
Other		57.9		60.4
Total	$	264.8	$	243.6
Noncurrent accrued liabilities:
Accrued development costs	$	55.4	$	48.1
Deferred income		81.6		25.9
Insurance claims and expenses		36.4		18.7
Operating lease liabilities		15.8		17.4
Other postretirement benefits		10.2		7.1
Employee benefits		6.1		4.8
Reserve for uncertain tax positions		3.5		.3
Other		10.0		6.7
Total	$	219.0	$	129.0