v3.26.1
Financial Instruments - Schedule of Fair Value Measurement of Assets and Liabilities (Details) - JPY (¥)
¥ in Millions
Mar. 31, 2026
Mar. 31, 2025
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets ¥ 15,511,506 ¥ 14,248,344
Liabilities 8,080,858 7,312,365
Fair value    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 533,009 413,592
Liabilities 23,709 20,890
Fair value | Derivative financial instruments | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities 20,524 16,309
Fair value | Derivative financial instruments | Derivative hedging instruments | Derivative hedging instruments    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities   219
Fair value | Financial liabilities associated with contingent consideration arrangements | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities 3,185 4,362
Fair value | Derivative financial instruments | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 11,102 12,361
Fair value | Derivative financial instruments | Derivative hedging instruments | Derivative hedging instruments    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 156,818 72,007
Fair value | Investments in convertible notes | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 8,776 10,424
Fair value | Investments in debt instruments | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 21,219 12,005
Fair value | Investments in debt instruments | Measured at fair value through other comprehensive income    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 85,148 79,342
Fair value | Financial assets associated with contingent consideration arrangements | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 10,488 10,197
Fair value | Trade and other receivables | Measured at fair value through other comprehensive income    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 66,424 65,568
Fair value | Equity instruments | Measured at fair value through other comprehensive income    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 173,034 151,687
Fair value | Level 1    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 191,876 157,415
Liabilities 0 0
Fair value | Level 1 | Derivative financial instruments | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities 0 0
Fair value | Level 1 | Derivative financial instruments | Derivative hedging instruments | Derivative hedging instruments    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities   0
Fair value | Level 1 | Financial liabilities associated with contingent consideration arrangements | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities 0 0
Fair value | Level 1 | Derivative financial instruments | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 0 0
Fair value | Level 1 | Derivative financial instruments | Derivative hedging instruments | Derivative hedging instruments    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 0 0
Fair value | Level 1 | Investments in convertible notes | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 0 0
Fair value | Level 1 | Investments in debt instruments | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 0 0
Fair value | Level 1 | Investments in debt instruments | Measured at fair value through other comprehensive income    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 85,148 79,342
Fair value | Level 1 | Financial assets associated with contingent consideration arrangements | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 0 0
Fair value | Level 1 | Trade and other receivables | Measured at fair value through other comprehensive income    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 0 0
Fair value | Level 1 | Equity instruments | Measured at fair value through other comprehensive income    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 106,729 78,073
Fair value | Level 2    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 225,091 140,467
Liabilities 8,358 6,694
Fair value | Level 2 | Derivative financial instruments | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities 8,358 6,475
Fair value | Level 2 | Derivative financial instruments | Derivative hedging instruments | Derivative hedging instruments    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities   219
Fair value | Level 2 | Financial liabilities associated with contingent consideration arrangements | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities 0 0
Fair value | Level 2 | Derivative financial instruments | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 1,849 2,892
Fair value | Level 2 | Derivative financial instruments | Derivative hedging instruments | Derivative hedging instruments    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 156,818 72,007
Fair value | Level 2 | Investments in convertible notes | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 0 0
Fair value | Level 2 | Investments in debt instruments | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 0 0
Fair value | Level 2 | Investments in debt instruments | Measured at fair value through other comprehensive income    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 0 0
Fair value | Level 2 | Financial assets associated with contingent consideration arrangements | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 0 0
Fair value | Level 2 | Trade and other receivables | Measured at fair value through other comprehensive income    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 66,424 65,568
Fair value | Level 2 | Equity instruments | Measured at fair value through other comprehensive income    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 0 0
Fair value | Level 3    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 116,042 115,709
Liabilities 15,351 14,196
Fair value | Level 3 | Derivative financial instruments | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities 12,166 9,834
Fair value | Level 3 | Derivative financial instruments | Derivative hedging instruments | Derivative hedging instruments    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities   0
Fair value | Level 3 | Financial liabilities associated with contingent consideration arrangements | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities 3,185 4,362
Fair value | Level 3 | Derivative financial instruments | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 9,253 9,470
Fair value | Level 3 | Derivative financial instruments | Derivative hedging instruments | Derivative hedging instruments    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 0 0
Fair value | Level 3 | Investments in convertible notes | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 8,776 10,424
Fair value | Level 3 | Investments in debt instruments | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 21,219 12,005
Fair value | Level 3 | Investments in debt instruments | Measured at fair value through other comprehensive income    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 0 0
Fair value | Level 3 | Financial assets associated with contingent consideration arrangements | Measured at fair value through profit or loss    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 10,488 10,197
Fair value | Level 3 | Trade and other receivables | Measured at fair value through other comprehensive income    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 0 0
Fair value | Level 3 | Equity instruments | Measured at fair value through other comprehensive income    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets ¥ 66,306 ¥ 73,614