15. debt the tables below summarize our outstanding debt at 30 september 2016 and 2015: total debt.

30 september | 2016 | 2015
short-term borrowings | $935.8 | $1494.3
current portion of long-term debt | 371.3 | 435.6
long-term debt | 4918.1 | 3949.1
total debt | $6225.2 | $5879.0
short-term borrowings | - | -
30 september | 2016 | 2015
bank obligations | $133.1 | $234.3
commercial paper | 802.7 | 1260.0
total short-term borrowings | $935.8 | $1494.3

the weighted average interest rate of short-term borrowings outstanding at 30 september 2016 and 2015 was 1.1% (1.1%) and.8% (.8%), respectively. cash paid for interest, net of amounts capitalized, was $121.1 in 2016, $97.5 in 2015, and $132.4 in 2014..

what was the total cash paid for interest in the years of 2015 and 2016, combined? 218.6

including the year of 2014, what then becomes this total? 351.0

and what was the average cash paid for interest between those three years?