SQL to find RMAN Backup Duration

select TO_CHAR(start_time,'yyyy-mm-dd hh24:mi:ss') Start_Time,
TO_CHAR(end_time,'yyyy-mm-dd hh24:mi:ss') End_Time , INPUT_TYPE, round(ELAPSED_SECONDS/60) MINUTES
from v$rman_backup_job_details order by Start_Time asc
/

START_TIME END_TIME INPUT_TYPE MINUTES
------------------------------ ------------------------------ ------------- ----------
2012-01-02 01:00:24 2012-01-02 01:43:34 DB INCR 43
2012-01-02 18:01:07 2012-01-02 19:10:20 ARCHIVELOG 69
2012-01-06 14:52:48 2012-01-06 20:11:54 DB FULL 319