v3.25.2
Bonds and Loans - Schedule of Composition of Bonds (Details)
€ in Millions, ¥ in Millions, $ in Millions
Mar. 31, 2025
JPY (¥)
Mar. 31, 2025
EUR (€)
Mar. 31, 2025
USD ($)
Oct. 06, 2024
JPY (¥)
Jul. 12, 2024
USD ($)
Jul. 05, 2024
USD ($)
Jun. 25, 2024
JPY (¥)
Mar. 31, 2024
JPY (¥)
Mar. 31, 2024
USD ($)
Disclosure of detailed information about borrowings [line items]                  
Bonds ¥ 4,190,632             ¥ 4,092,879  
2019 Hybrid bonds (subordinated bonds)                  
Disclosure of detailed information about borrowings [line items]                  
Principal amount in contractual currency (millions) 500,000     ¥ 500,000          
Bonds ¥ 0             499,614  
Spread on variable interest rate 1.72% 1.72% 1.72%            
2019 Hybrid bonds (subordinated bonds) | LIBOR | Minimum                  
Disclosure of detailed information about borrowings [line items]                  
Interest rate (%) 1.75% 1.75% 1.75%            
2019 Hybrid bonds (subordinated bonds) | LIBOR | Maximum                  
Disclosure of detailed information about borrowings [line items]                  
Interest rate (%) 2.75% 2.75% 2.75%            
2018 EUR Unsecured Senior Notes – fixed rate                  
Disclosure of detailed information about borrowings [line items]                  
Principal amount in contractual currency (millions) | €   € 3,000              
Bonds ¥ 482,180             487,381  
2018 EUR Unsecured Senior Notes – fixed rate | Minimum                  
Disclosure of detailed information about borrowings [line items]                  
Interest rate (%) 2.25% 2.25% 2.25%            
2018 EUR Unsecured Senior Notes – fixed rate | Maximum                  
Disclosure of detailed information about borrowings [line items]                  
Interest rate (%) 3.00% 3.00% 3.00%            
2018 USD Unsecured Senior Notes – fixed rate                  
Disclosure of detailed information about borrowings [line items]                  
Principal amount in contractual currency (millions) | $     $ 1,750            
Bonds ¥ 259,681             263,701  
Interest rate (%) 5.00% 5.00% 5.00%            
Unsecured Senior Notes Assumed in Shire Acquisition                  
Disclosure of detailed information about borrowings [line items]                  
Principal amount in contractual currency (millions) | $     $ 1,500   $ 1,500       $ 3,000
Bonds ¥ 219,033             439,725  
Interest rate (%) 3.20% 3.20% 3.20%            
Unsecured Senior Notes Assumed in Shire Acquisition                  
Disclosure of detailed information about borrowings [line items]                  
Principal amount in contractual currency (millions) | $     $ 1,301            
Bonds ¥ 195,295             198,116  
Unsecured Senior Notes Assumed in Shire Acquisition | Minimum                  
Disclosure of detailed information about borrowings [line items]                  
Interest rate (%) 4.00% 4.00% 4.00%            
Unsecured Senior Notes Assumed in Shire Acquisition | Maximum                  
Disclosure of detailed information about borrowings [line items]                  
Interest rate (%) 5.25% 5.25% 5.25%            
2020 USD Unsecured Senior Notes – fixed rate                  
Disclosure of detailed information about borrowings [line items]                  
Principal amount in contractual currency (millions) | $     $ 7,000            
Bonds ¥ 1,037,021             1,053,742  
2020 USD Unsecured Senior Notes – fixed rate | Minimum                  
Disclosure of detailed information about borrowings [line items]                  
Interest rate (%) 2.05% 2.05% 2.05%            
2020 USD Unsecured Senior Notes – fixed rate | Maximum                  
Disclosure of detailed information about borrowings [line items]                  
Interest rate (%) 3.375% 3.375% 3.375%            
2020 EUR Unsecured Senior Notes – fixed rate                  
Disclosure of detailed information about borrowings [line items]                  
Principal amount in contractual currency (millions) | €   € 3,600              
Bonds ¥ 577,703             584,105  
2020 EUR Unsecured Senior Notes – fixed rate | Minimum                  
Disclosure of detailed information about borrowings [line items]                  
Interest rate (%) 0.75% 0.75% 0.75%            
2020 EUR Unsecured Senior Notes – fixed rate | Maximum                  
Disclosure of detailed information about borrowings [line items]                  
Interest rate (%) 2.00% 2.00% 2.00%            
2021 JPY Unsecured Senior Bonds – fixed rate                  
Disclosure of detailed information about borrowings [line items]                  
Principal amount in contractual currency (millions) ¥ 250,000                
Bonds ¥ 249,561             249,495  
Interest rate (%) 0.40% 0.40% 0.40%            
2024 Hybrid bonds (subordinated bonds)                  
Disclosure of detailed information about borrowings [line items]                  
Principal amount in contractual currency (millions) ¥ 460,000           ¥ 460,000    
Bonds ¥ 457,983             0  
Spread on variable interest rate 1.934% 1.934% 1.934%            
2024 Hybrid bonds (subordinated bonds) | Japan Government Bond Interest Rate | Minimum                  
Disclosure of detailed information about borrowings [line items]                  
Interest rate (%) 1.40% 1.40% 1.40%            
2024 Hybrid bonds (subordinated bonds) | Japan Government Bond Interest Rate | Maximum                  
Disclosure of detailed information about borrowings [line items]                  
Interest rate (%) 2.40% 2.40% 2.40%            
2024 USD Unsecured Senior Notes – fixed rate                  
Disclosure of detailed information about borrowings [line items]                  
Principal amount in contractual currency (millions) | $     $ 3,000     $ 3,000      
Bonds ¥ 442,175             0  
2024 USD Unsecured Senior Notes – fixed rate | Minimum                  
Disclosure of detailed information about borrowings [line items]                  
Interest rate (%) 5.30% 5.30% 5.30%            
2024 USD Unsecured Senior Notes – fixed rate | Maximum                  
Disclosure of detailed information about borrowings [line items]                  
Interest rate (%) 5.80% 5.80% 5.80%            
Commercial Paper                  
Disclosure of detailed information about borrowings [line items]                  
Principal amount in contractual currency (millions) ¥ 270,000             317,000  
Bonds ¥ 270,000             ¥ 317,000  
Interest rate (%) 0.00% 0.00% 0.00%