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Employee Benefit Plans - New Enviri
 3 Months Ended
Mar. 31, 2026
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Employee Benefit Plans Employee Benefit Plans*
 Three Months Ended
March 31
Defined Benefit Pension Plans Net Periodic Pension Cost (Benefit)U.S. PlansInternational Plans
(In thousands)2026202520262025
Service costs$— $— $260 $303 
Interest costs2,031 2,313 7,372 7,387 
Expected return on plan assets(2,287)(2,562)(7,804)(6,499)
Recognized prior service costs— — 108 113 
Recognized actuarial losses751 785 3,754 3,698 
Defined benefit pension plans net periodic pension cost (benefit)$495 $536 $3,690 $5,002 

Cash contributions to U.S. and international defined benefit pension plans totaled $0.4 million and $0.2 million for the three months ended March 31, 2026, respectively. The Company's estimate of expected cash contributions to be paid during the remainder of 2026 for the U.S. and international defined benefit pension plans is $1.2 million and $0.7 million, respectively.


*    Previously issued 2025 amounts have been revised due to the correction of immaterial errors, as identified in Note 1, Basis of Presentation under "Revision of Previously Issued Financial Statements".
New Enviri  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Employee Benefit Plans Employee Benefit Plans
Three Months Ended
March 31
Defined Benefit Pension Plans Net Periodic Pension Cost (Benefit)U.S. PlansInternational Plans
(In thousands)2026202520262025
Service costs$— $— $260 $303 
Interest costs2,031 2,313 7,372 7,387 
Expected return on plan assets(2,287)(2,562)(7,804)(6,499)
Recognized prior service costs— — 108 113 
Recognized actuarial losses751 785 3,754 3,698 
Defined benefit pension plans net periodic pension cost (benefit)$495 $536 $3,690 $5,002 
Cash contributions to U.S. and international defined benefit pension plans totaled $0.4 million and $0.2 million for the three months ended March 31, 2026, respectively. New Enviri's estimate of expected cash contributions to be paid during the remainder of 2026 for the U.S. and international defined benefit pension plans is $1.2 million and $0.7 million, respectively.