pre_text: As of December 31, 2019, our required annual payments relating to these contractual obligations were as follows (in millions): (1) Includes finance lease obligations. (2) These calculations include the effect of our interest rate swaps and assume that (a) applicable margins remain constant; (b) our term A loan and revolving credit facility variable rate debt is priced at the one-month LIBOR rate in effect as of December 31, 2019; (c) only mandatory debt repayments are made; and (d) no refinancing occurs at debt maturity. (3) Other includes commitment fees on our revolving credit facility and rating agencies fees.
table: Payments due by period
table: Total 2020 2021-2022 2023-2024
table: Debt(1) $1,554.8 $80.0 $184.1 $1,290.7
table: Interest on debt (2) 171.5 54.7 102.0 14.8
table: Data processing and maintenance commitments 103.4 44.5 46.5 12.4
table: Operating lease payments 27.5 12.6 11.5 3.4
table: Other(3) 3.9 1.2 2.4 0.3
table: Total $1,861.1 $193.0 $346.5 $1,321.6
question: Analyse this data from a financial earnings document. What was the difference between Total Debt and Total Interest on Debt?