v3.25.4
SCOPE OF CONSOLIDATION - Joint Ventures Narrative AMNS India (Details)
tonne in Millions, t in Millions, $ in Millions
6 Months Ended 12 Months Ended
Mar. 30, 2023
USD ($)
Dec. 16, 2019
Dec. 08, 2019
Dec. 31, 2026
tonne
t
Dec. 31, 2025
USD ($)
km
tonne
service_center
plant
plant_system
t
Dec. 31, 2024
Dec. 31, 2023
Mar. 16, 2020
USD ($)
Disclosure of joint ventures [line items]                
Capacity of steelmaking | t         40.0      
Borrowings         $ 13,410      
5.146 billion term loan, due 2030                
Disclosure of joint ventures [line items]                
Notional amount               $ 5,100
AMNS India                
Disclosure of joint ventures [line items]                
Crude steel capacity | tonne         8.8      
Proportion of ownership interest in joint venture (in percent)   60.00% 60.00%   60.00% 60.00% 60.00%  
Number of iron ore beneficiation plants | plant         2      
Number of service centers | service_center         6      
Number of pellet plant systems | plant_system         2      
Production capacity, number of pellet tonnes per annum | t         16.0      
Length connecting transmission line | km         100      
Contractual capital commitments         $ 7,700      
AMNS India | Forecast                
Disclosure of joint ventures [line items]                
Capacity of rolled products | tonne       15.0        
AMNS India | Debottlenecking                
Disclosure of joint ventures [line items]                
Contractual capital commitments         800      
AMNS India | Downstream                
Disclosure of joint ventures [line items]                
Contractual capital commitments         1,000      
AMNS India | Upstream                
Disclosure of joint ventures [line items]                
Contractual capital commitments         5,700      
AMNS India | Operational readiness                
Disclosure of joint ventures [line items]                
Contractual capital commitments         $ 200      
AMNS India | Rajayapeta in Andhra Pradesh                
Disclosure of joint ventures [line items]                
Capacity of steel production (in tonnes) | t       8.2        
AMNS India | Kirandul-Vizag system                
Disclosure of joint ventures [line items]                
Production capacity, number of pellet tonnes per annum | t         8.0      
AMNS India | Dabuna-Paradeep system                
Disclosure of joint ventures [line items]                
Production capacity, number of pellet tonnes per annum | t         12.0      
AMNS Luxembourg | 5 billion Japanese floating rate term loan                
Disclosure of joint ventures [line items]                
Borrowings maturity, term 10 years              
Borrowings $ 5,000              
NSC | AMNS India                
Disclosure of joint ventures [line items]                
Proportion of ownership interest in joint venture (in percent)     40.00%