v3.26.1
Restructuring and Impairment - Restructuring Liability, 2025 Efficiency Plan (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Mar. 31, 2026
Mar. 31, 2025
Restructuring Cost and Reserve [Line Items]        
Accelerated depreciation   $ 65    
Restructuring and impairment expenses, net $ 19 85    
2025 Efficiency Plan        
Restructuring Cost and Reserve [Line Items]        
Employee-related expenses 12   $ 60 $ 2
Accelerated depreciation     86  
Pension curtailment and settlement gains   (11) (11)  
Professional fees 3   21  
Other     7  
Restructuring and impairment expenses, net 15 83 163 2
Cumulative restructuring charges through June 30, 2026 180      
Operating Segments | North America        
Restructuring Cost and Reserve [Line Items]        
Restructuring and impairment expenses, net 4 47    
Operating Segments | North America | 2025 Efficiency Plan        
Restructuring Cost and Reserve [Line Items]        
Employee-related expenses 1   15 2
Accelerated depreciation     46  
Pension curtailment and settlement gains     (11)  
Professional fees 0   0  
Other     7  
Restructuring and impairment expenses, net 1   57 2
Cumulative restructuring charges through June 30, 2026 60      
Operating Segments | Europe        
Restructuring Cost and Reserve [Line Items]        
Restructuring and impairment expenses, net 12 8    
Operating Segments | Europe | 2025 Efficiency Plan        
Restructuring Cost and Reserve [Line Items]        
Employee-related expenses 10   29 0
Accelerated depreciation     0  
Pension curtailment and settlement gains     0  
Professional fees 2   2  
Other     0  
Restructuring and impairment expenses, net 12   31 0
Cumulative restructuring charges through June 30, 2026 43      
Operating Segments | Asia        
Restructuring Cost and Reserve [Line Items]        
Restructuring and impairment expenses, net 0 20    
Operating Segments | Asia | 2025 Efficiency Plan        
Restructuring Cost and Reserve [Line Items]        
Employee-related expenses 0   2 0
Accelerated depreciation     40  
Pension curtailment and settlement gains     0  
Professional fees 0   0  
Other     0  
Restructuring and impairment expenses, net 0   42 0
Cumulative restructuring charges through June 30, 2026 42      
Operating Segments | South America        
Restructuring Cost and Reserve [Line Items]        
Restructuring and impairment expenses, net 1 1    
Operating Segments | South America | 2025 Efficiency Plan        
Restructuring Cost and Reserve [Line Items]        
Employee-related expenses 0   1 0
Accelerated depreciation     0  
Pension curtailment and settlement gains     0  
Professional fees 0   0  
Other     0  
Restructuring and impairment expenses, net 0   1 0
Cumulative restructuring charges through June 30, 2026 1      
Other Operations        
Restructuring Cost and Reserve [Line Items]        
Restructuring and impairment expenses, net 2 $ 9    
Other Operations | 2025 Efficiency Plan        
Restructuring Cost and Reserve [Line Items]        
Employee-related expenses 1   13 0
Accelerated depreciation     0  
Pension curtailment and settlement gains     0  
Professional fees 1   19  
Other     0  
Restructuring and impairment expenses, net 2   $ 32 $ 0
Cumulative restructuring charges through June 30, 2026 $ 34