GV$DETACHED_SESSION definition in Oracle Database 11.2
GV$DETACHED_SESSION
SELECT
indx, -- INDX NUMBER
inst_id, -- INST_ID NUMBER
ksupgsnm, -- PG_NAME VARCHAR2(30)
ksupgsid, -- SID NUMBER
ksupgser, -- SERIAL# NUMBER
ksupgspd -- PID NUMBER
FROM
x$ksupgs