v3.26.1
Unsecured senior notes - General (Details)
¥ in Millions, $ in Millions
1 Months Ended
Nov. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Nov. 30, 2021
USD ($)
Nov. 30, 2019
USD ($)
Nov. 30, 2017
USD ($)
Mar. 31, 2026
USD ($)
Mar. 31, 2026
CNY (¥)
Mar. 31, 2025
USD ($)
Mar. 31, 2025
CNY (¥)
Nov. 30, 2024
CNY (¥)
Feb. 28, 2021
USD ($)
Dec. 31, 2017
USD ($)
Nov. 30, 2014
USD ($)
Unsecured senior notes                          
Unsecured senior notes                          
Carrying value             ¥ 117,485   ¥ 122,398        
Unamortized discount and debt issuance costs             725   838        
Total principal amount             118,210   123,236        
Less: current portion of principal amounts of unsecured senior notes             0   0        
Non-current portion of principal amounts of unsecured senior notes             ¥ 118,210   ¥ 123,236        
2014 Senior Notes                          
Unsecured senior notes                          
Principal amount | $                         $ 8,000
Repayment amount | $ $ 2,250   $ 1,500 $ 2,250 $ 1,300                
2017 Senior Notes                          
Unsecured senior notes                          
Principal amount | $                       $ 7,000  
Repayment amount | $   $ 700                      
2021 Senior Notes                          
Unsecured senior notes                          
Principal amount | $                     $ 5,000    
2024 Senior Notes                          
Unsecured senior notes                          
Principal amount $ 2,650                 ¥ 17,000      
US$2,550 million 3.400% notes due 2027 | Unsecured senior notes                          
Unsecured senior notes                          
Principal amount | $           $ 2,550   $ 2,550          
Fixed interest rate           3.40% 3.40% 3.40% 3.40%        
Carrying value             ¥ 17,582   ¥ 18,434        
Effective interest rate           3.52% 3.52% 3.52% 3.52%        
RMB8,400 million 2.650% notes due 2028 | Unsecured senior notes                          
Unsecured senior notes                          
Principal amount             ¥ 8,400   ¥ 8,400        
Fixed interest rate           2.65% 2.65% 2.65% 2.65%        
Carrying value             ¥ 8,368   ¥ 8,353        
Effective interest rate           2.83% 2.83% 2.83% 2.83%        
RMB5,000 million 2.800% notes due 2029 | Unsecured senior notes                          
Unsecured senior notes                          
Principal amount             ¥ 5,000   ¥ 5,000        
Fixed interest rate           2.80% 2.80% 2.80% 2.80%        
Carrying value             ¥ 4,977   ¥ 4,971        
Effective interest rate           2.93% 2.93% 2.93% 2.93%        
US$1,000 million 4.875% notes due 2030 | Unsecured senior notes                          
Unsecured senior notes                          
Principal amount | $           $ 1,000   $ 1,000          
Fixed interest rate           4.875% 4.875% 4.875% 4.875%        
Carrying value             ¥ 6,871   ¥ 7,205        
Effective interest rate           5.01% 5.01% 5.01% 5.01%        
US$1,500 million 2.125% notes due 2031 | Unsecured senior notes                          
Unsecured senior notes                          
Principal amount | $           $ 1,500   $ 1,500          
Fixed interest rate           2.125% 2.125% 2.125% 2.125%        
Carrying value             ¥ 10,328   ¥ 10,834        
Effective interest rate           2.20% 2.20% 2.20% 2.20%        
US$700 million 4.500% notes due 2034 | Unsecured senior notes                          
Unsecured senior notes                          
Principal amount | $           $ 700   $ 700          
Fixed interest rate           4.50% 4.50% 4.50% 4.50%        
Carrying value             ¥ 4,799   ¥ 5,034        
Effective interest rate           4.60% 4.60% 4.60% 4.60%        
RMB2,500 million 3.100% notes due 2034 | Unsecured senior notes                          
Unsecured senior notes                          
Principal amount             ¥ 2,500   ¥ 2,500        
Fixed interest rate           3.10% 3.10% 3.10% 3.10%        
Carrying value             ¥ 2,486   ¥ 2,485        
Effective interest rate           3.17% 3.17% 3.17% 3.17%        
US$1,150 million 5.250% notes due 2035 | Unsecured senior notes                          
Unsecured senior notes                          
Principal amount | $           $ 1,150   $ 1,150          
Fixed interest rate           5.25% 5.25% 5.25% 5.25%        
Carrying value             ¥ 7,882   ¥ 8,268        
Effective interest rate           5.35% 5.35% 5.35% 5.35%        
US$1,000 million 4.000% notes due 2037 | Unsecured senior notes                          
Unsecured senior notes                          
Principal amount | $           $ 1,000   $ 1,000          
Fixed interest rate           4.00% 4.00% 4.00% 4.00%        
Carrying value             ¥ 6,865   ¥ 7,203        
Effective interest rate           4.06% 4.06% 4.06% 4.06%        
US$1,000 million 2.700% notes due 2041 | Unsecured senior notes                          
Unsecured senior notes                          
Principal amount | $           $ 1,000   $ 1,000          
Fixed interest rate           2.70% 2.70% 2.70% 2.70%        
Carrying value             ¥ 6,824   ¥ 7,158        
Effective interest rate           2.80% 2.80% 2.80% 2.80%        
RMB1,100 million 3.500% notes due 2044 | Unsecured senior notes                          
Unsecured senior notes                          
Principal amount             ¥ 1,100   ¥ 1,100        
Fixed interest rate           3.50% 3.50% 3.50% 3.50%        
Carrying value             ¥ 1,094   ¥ 1,093        
Effective interest rate           3.54% 3.54% 3.54% 3.54%        
US$1,750 million 4.200% notes due 2047 | Unsecured senior notes                          
Unsecured senior notes                          
Principal amount | $           $ 1,750   $ 1,750          
Fixed interest rate           4.20% 4.20% 4.20% 4.20%        
Carrying value             ¥ 11,993   ¥ 12,586        
Effective interest rate           4.25% 4.25% 4.25% 4.25%        
US$1,500 million 3.150% notes due 2051 | Unsecured senior notes                          
Unsecured senior notes                          
Principal amount | $           $ 1,500   $ 1,500          
Fixed interest rate           3.15% 3.15% 3.15% 3.15%        
Carrying value             ¥ 10,287   ¥ 10,796        
Effective interest rate           3.19% 3.19% 3.19% 3.19%        
US$500 million 5.625% notes due 2054 | Unsecured senior notes                          
Unsecured senior notes                          
Principal amount | $           $ 500   $ 500          
Fixed interest rate           5.625% 5.625% 5.625% 5.625%        
Carrying value             ¥ 3,427   ¥ 3,597        
Effective interest rate           5.67% 5.67% 5.67% 5.67%        
US$1,000 million 4.400% notes due 2057 | Unsecured senior notes                          
Unsecured senior notes                          
Principal amount | $           $ 1,000   $ 1,000          
Fixed interest rate           4.40% 4.40% 4.40% 4.40%        
Carrying value             ¥ 6,847   ¥ 7,186        
Effective interest rate           4.44% 4.44% 4.44% 4.44%        
US$1,000 million 3.250% notes due 2061 | Unsecured senior notes                          
Unsecured senior notes                          
Principal amount | $           $ 1,000   $ 1,000          
Fixed interest rate           3.25% 3.25% 3.25% 3.25%        
Carrying value             ¥ 6,855   ¥ 7,195        
Effective interest rate           3.28% 3.28% 3.28% 3.28%