v3.25.2
Financial risk management - Summary of Changes in Loss Allowances (Detail) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Financial instruments credit-impaired [member] | Loans [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Beginning Balance ¥ 1,779 ¥ 1,137
Changes due to financial assets recognized    
— Financial assets that have been derecognized (179) (251)
New financial assets originated or purchased 48 869
Write-offs (28)  
Changes in models/risk parameters   24
Ending Balance 1,620 1,779
Lifetime expected credit losses [member] | Trade And Other Receivables And Contract Assets Including Noncurrent Other Receivables In The Pictures Segment [Member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Beginning Balance 33,066 27,534
Changes due to financial assets recognized    
— Financial assets that have been derecognized (1,843) (2,018)
New financial assets originated or purchased 9,408 9,464
Write-offs (11,936) (5,990)
Changes in models/risk parameters (1,400) 643
Foreign exchange and other movements (448) 3,433
Ending Balance 26,847 33,066
Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | Loans [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Beginning Balance 1,502 824
Changes due to financial assets recognized    
— Transfer to lifetime expected credit losses 2 1
— Transfer to 12-month expected credit losses (166) (106)
— Financial assets that have been derecognized (156) (227)
New financial assets originated or purchased 16 823
Changes in models/risk parameters 189 187
Foreign exchange and other movements 0  
Ending Balance 1,387 1,502
12-month expected credit losses [member] | Financial instruments credit-impaired [member] | Loans [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Beginning Balance 277 313
Changes due to financial assets recognized    
— Transfer to lifetime expected credit losses (2) (1)
— Transfer to 12-month expected credit losses 166 106
— Financial assets that have been derecognized (23) (24)
New financial assets originated or purchased 32 45
Changes in models/risk parameters (217) (162)
Foreign exchange and other movements 0  
Ending Balance 233 277
12-month expected credit losses [member] | Debt securities [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Beginning Balance [1] 58 61
Changes due to financial assets recognized    
— Financial assets that have been derecognized [1] (3) (10)
New financial assets originated or purchased [1] 9 8
Changes in models/risk parameters [1] (3) (1)
Foreign exchange and other movements [1] 0 0
Ending Balance [1] ¥ 61 ¥ 58
[1] For all debt securities, Sony considers that the credit risk has not increased significantly since initial recognition, and therefore the loss allowance is measured at an amount equal to 12-months of expected credit losses.