Commitments and Contingencies - Additional Information (Details)					1 Months Ended		3 Months Ended
	Apr. 14, 2021 USD ($) mi	Jun. 30, 2018 party	Mar. 03, 2016 USD ($)	Apr. 11, 2014 USD ($) mi	Sep. 30, 2022 USD ($)	Oct. 31, 2016 USD ($)	Mar. 31, 2024 USD ($) site party mine mi	Dec. 31, 2023 USD ($)	Oct. 18, 2021	Apr. 30, 2015 USD ($)
Site Contingency
Number of sites subject to remediation (sites) | site							19
Number of sites, cost in excess of 100K (sites) | site							14
Cost per site minimis threshold							$ 100,000
Number of sites, investigation completed (sites) | site							15
Number of sites investigation in progress (sites) | site							4
Site contingency, number of sites subject to remediation activities, contains remediation systems | site							7
Site contingency, number of sites subject to remediation activities, monitored | site							8
Number of sites, active operations (sites) | site							1
Environmental loss accrual							$ 37,800,000	$ 39,000,000
Environmental							$ 8,200,000	$ 8,200,000
Environmental Loss Contingency Statement Of Financial Position Extensible Enumeration Not Disclosed Flag							Consolidated Balance Sheets
Loss accrual							$ 25,800,000
Lower Passaic River
Site Contingency
Portion of site subject to remediation (miles) | mi				8
Number of other potentially responsible parties | party		120					70
Estimate of cost										$ 726,000,000
Estimate low end						$ 165,000,000
Estimated development time (in years)						4 years
Lower Passaic River | Minimum
Site Contingency
Site contingency, loss exposure in excess of accrual best estimate			$ 1,380,000,000	$ 953,000,000
Lower Passaic River | Maximum
Site Contingency
Site contingency, loss exposure in excess of accrual best estimate			$ 1,730,000,000
Upper Nine Miles of the River
Site Contingency
Portion of site subject to remediation (miles) | mi	9
Site contingency, loss exposure in excess of accrual best estimate	$ 441,000,000
Lower Eight Miles of River
Site Contingency
Environmental loss accrual							$ 700,000
Settlement payment					$ 5,900,000
Arizona Uranium Mines
Site Contingency
Environmental loss accrual							$ 11,300,000
Investigative sites notice from EPA | mine							8
Percentage of expenses reimbursable by the U.S. (as a percent)									35.00%
Future contributions from U.S.							$ 2,800,000
Water Valley, Mississippi
Site Contingency
Loss accrual							$ 12,500,000
Related Party | Crucible Steel Corporation
Site Contingency
Number of sites subject to remediation (sites) | site							19
Portion of site subject to remediation (miles) | mi							17