v3.26.3
Estimated Fair Value of Financial Instruments (Information about Carrying Amount of Financial Instruments Reported in Consolidated Balance Sheets and Related Market or Fair Value) (Detail) - JPY (¥)
¥ in Millions
Sep. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Assets:      
Cash and cash equivalents ¥ 1,127,881 ¥ 1,015,359 ¥ 972,882
Restricted Cash 118,872 114,129 ¥ 117,811
Equity securities [1] 639,339 782,137  
Available-for-sale debt securities 2,333,404 2,360,361  
Other Assets:      
Derivative assets 60,089 73,633  
Liabilities:      
Short-term debt 561,590 544,135  
Deposits 6,603 2,330  
Policy liabilities and Policy account balances (Investment contracts) 1,953,856 1,943,710  
Long-term debt 5,540,896 5,799,160  
Other Liabilities:      
Derivative liabilities ¥ 48,775 ¥ 66,802  
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Other Liabilities Other Liabilities  
Level 1      
Assets:      
Cash and cash equivalents ¥ 1,127,881 ¥ 1,015,359  
Restricted Cash 118,872 114,129  
Installment loans (net of allowance for credit losses) 0 0  
Equity securities 146,962 [2] 149,949 [3]  
Available-for-sale debt securities 17,957 7,278  
Other Assets:      
Time deposits 0 0  
Reinsurance recoverables (Investment contracts) 0 0  
Liabilities:      
Short-term debt 0 0  
Deposits 0 0  
Policy liabilities and Policy account balances (Investment contracts) 0 0  
Long-term debt 0 0  
Accounts payable (Contingent consideration) 0 0  
Level 2      
Assets:      
Cash and cash equivalents 0 0  
Restricted Cash 0 0  
Installment loans (net of allowance for credit losses) 44,672 50,013  
Equity securities 136,092 [2] 120,456 [3]  
Available-for-sale debt securities 2,046,468 2,092,438  
Other Assets:      
Time deposits 1,035 924  
Reinsurance recoverables (Investment contracts) 0 0  
Liabilities:      
Short-term debt 561,590 544,135  
Deposits 6,630 2,345  
Policy liabilities and Policy account balances (Investment contracts) 0 0  
Long-term debt 1,557,952 1,616,472  
Accounts payable (Contingent consideration) 0 0  
Level 3      
Assets:      
Cash and cash equivalents 0 0  
Restricted Cash 0 0  
Installment loans (net of allowance for credit losses) 1,425,078 1,360,641  
Equity securities 64,129 [2] 230,596 [3]  
Available-for-sale debt securities 268,979 260,645  
Other Assets:      
Time deposits 0 0  
Reinsurance recoverables (Investment contracts) 290,745 277,544  
Liabilities:      
Short-term debt 0 0  
Deposits 0 0  
Policy liabilities and Policy account balances (Investment contracts) 330,566 331,178  
Long-term debt 3,887,200 4,109,474  
Accounts payable (Contingent consideration) 1,574 15,683  
Carrying amount      
Assets:      
Cash and cash equivalents 1,127,881 1,015,359  
Restricted Cash 118,872 114,129  
Installment loans (net of allowance for credit losses) 1,493,878 1,437,306  
Equity securities 347,183 [2] 501,001 [3]  
Available-for-sale debt securities 2,333,404 2,360,361  
Other Assets:      
Time deposits 1,035 924  
Derivative assets [4] 60,089 73,633  
Reinsurance recoverables (Investment contracts) 340,079 307,733  
Liabilities:      
Short-term debt 561,590 544,135  
Deposits 6,603 2,330  
Policy liabilities and Policy account balances (Investment contracts) 414,004 390,523  
Long-term debt 5,540,896 5,799,160  
Accounts payable (Contingent consideration) 1,574 15,683  
Other Liabilities:      
Derivative liabilities [4] 48,775 66,802  
Estimated fair value      
Assets:      
Cash and cash equivalents 1,127,881 1,015,359  
Restricted Cash 118,872 114,129  
Installment loans (net of allowance for credit losses) 1,469,750 1,410,654  
Equity securities 347,183 [2] 501,001 [3]  
Available-for-sale debt securities 2,333,404 2,360,361  
Other Assets:      
Time deposits 1,035 924  
Derivative assets [4] 60,089 73,633  
Reinsurance recoverables (Investment contracts) 290,745 277,544  
Liabilities:      
Short-term debt 561,590 544,135  
Deposits 6,630 2,345  
Policy liabilities and Policy account balances (Investment contracts) 330,566 331,178  
Long-term debt 5,445,152 5,725,946  
Accounts payable (Contingent consideration) 1,574 15,683  
Other Liabilities:      
Derivative liabilities [4] ¥ 48,775 ¥ 66,802  
[1] The amount of assets under management of variable annuity and variable life insurance contracts included in equity securities were ¥137,933 million and ¥146,898 million as of March 31, 2026 and September 30, 2026, respectively. The amount of investment funds that elected the fair value option and were included in equity securities were ¥24,845 million and ¥25,231 million as of March 31, 2026 and September 30, 2026, respectively.
[2] The amount of ¥182,674 million of investment funds measured at net asset value per share is not included.
[3] The amount of ¥168,854 million of investment funds measured at net asset value per share is not included.
[4] It represents the amount after offset under counterparty netting of derivative assets and liabilities. For the information of input level before netting, see Note 3 “Fair Value Measurements.”