Redemtion of 100 M$ - Good100 M$ is not a big amount but it is a very positive signal.
Don't forget that the Q1 is intensive in consuming cash. They already announced that it will be largely negative in free cash flow for inventory building purpose in Q1.
They redeemed at par 100 M$ at the same time.
More important for the signal than for the interest saved (7,8 M$ per annum).
Proof of confidence.