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PENSION AND OTHER POST-EMPLOYMENT BENEFIT OBLIGATIONS
 3 Months Ended
Mar. 31, 2025
Postemployment Benefits [Abstract]  
PENSION AND OTHER POST-EMPLOYMENT BENEFIT OBLIGATIONS
NOTE 13 - PENSION AND OTHER POST-EMPLOYMENT BENEFIT OBLIGATIONS
Three months ended March 31,
20252024
(in millions of U.S. dollar)PensionOPEB and Other BenefitsPensionOPEB and Other Benefits
Current service cost(4)(1)(4)(1)
Interest cost(6)(2)(6)(2)
Expected return on plan assets6— 6—
Amortization of past service (cost) / gain—3 —3
Total net pension and other long-term benefit cost(4)— (4)—
For the year ended December 31, 2025 as a whole, we expect to contribute approximately $30 million to our defined benefit pension plans and approximately $14 million to our other post-retirement and long-term benefit plans.