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Restructuring, Impairment, and Related Charges, Net - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 24 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2026
Mar. 31, 2025
Restructuring Cost and Reserve [Line Items]          
Restructuring charges $ 136   $ 47    
Employee Severance, Employee-Related Costs, Exit-Related Costs and Asset Impairments          
Restructuring Cost and Reserve [Line Items]          
Restructuring charges 61 $ 20      
Strategic Growth Initiative Plan - Operational Efficiencies and Cost Optimization          
Restructuring Cost and Reserve [Line Items]          
Restructuring charges 45   $ 38 $ 468  
Minimum | Employee Severance, Employee-Related Costs, Exit-Related Costs and Asset Impairments          
Restructuring Cost and Reserve [Line Items]          
Restructuring charges   200      
Minimum | Workforce and Operating Model Optimization          
Restructuring Cost and Reserve [Line Items]          
Restructuring, anticipated total charges 230        
Minimum | Strategic Growth Initiative Plan - Operational Efficiencies and Cost Optimization          
Restructuring Cost and Reserve [Line Items]          
Restructuring, anticipated total charges         $ 650
Maximum | Employee Severance, Employee-Related Costs, Exit-Related Costs and Asset Impairments          
Restructuring Cost and Reserve [Line Items]          
Restructuring charges   $ 250      
Maximum | Workforce and Operating Model Optimization          
Restructuring Cost and Reserve [Line Items]          
Restructuring, anticipated total charges $ 310        
Maximum | Strategic Growth Initiative Plan - Operational Efficiencies and Cost Optimization          
Restructuring Cost and Reserve [Line Items]          
Restructuring, anticipated total charges         $ 700