v3.26.1
Financing Arrangement - Senior Notes (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Feb. 28, 2021
Feb. 29, 2016
Mar. 31, 2026
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Debt Instrument [Line Items]            
Proceeds from issuance of senior notes, net of issuance costs $ 1,478 $ 395        
Repayments of senior debt       $ 400 $ 0 $ 0
2026 Notes            
Debt Instrument [Line Items]            
Long-term debt   $ 400 $ 0 $ 0 400  
Contractual interest rate of 0.75% Convertible Senior Notes due 2016   4.80% 4.80% 4.80%    
Effective interest rate   4.97%        
Repayments of senior debt     $ 400      
2031 Notes            
Debt Instrument [Line Items]            
Long-term debt $ 750   $ 750 $ 750 750  
Contractual interest rate of 0.75% Convertible Senior Notes due 2016 1.85%   1.85% 1.85%    
Effective interest rate 1.98%          
Debt instrument, convertible, remaining discount amortization period     4 years 10 months 24 days 4 years 10 months 24 days    
2051 Notes            
Debt Instrument [Line Items]            
Long-term debt $ 750   $ 750 $ 750 750  
Contractual interest rate of 0.75% Convertible Senior Notes due 2016 2.95%   2.95% 2.95%    
Effective interest rate 3.04%          
Debt instrument, convertible, remaining discount amortization period     24 years 10 months 24 days 24 years 10 months 24 days    
Senior Notes            
Debt Instrument [Line Items]            
Long-term debt     $ 1,500 $ 1,500 1,900  
Unaccreted discount $ 6 $ 1 (4) (4) (5)  
Debt issuance costs, net $ (16) $ (4) $ (11) $ (11) $ (11)  
Debt instrument, redemption price, percentage       100.00%    
Change of control repurchase event            
Debt Instrument [Line Items]            
Debt instrument, redemption price, percentage       101.00%