XML 127 R79.htm IDEA: XBRL DOCUMENT v3.20.2
Revenue from services provided to customers - Revenues by types of service (Detail) - JPY (¥)
¥ in Millions
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Disaggregation of Revenue [Abstract]      
Commissions ¥ 308,805 ¥ 293,069 ¥ 373,313
Fees from investment banking 103,222 101,521 101,663
Asset management and portfolio service fees 238,202 245,519 ¥ 245,616
Other revenue 49,901 54,284  
Total ¥ 700,130 ¥ 694,393