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Debt
 9 Months Ended
Jan. 31, 2021
Debt Disclosure [Abstract]  
Debt Debt
Our long-term debt (net of unamortized discount and issuance costs) consists of:
(Principal and carrying amounts in millions)April 30, 2020January 31,
2021
2.250% senior notes, $250 principal amount, due January 15, 2023
$249 $249 
3.500% senior notes, $300 principal amount, due April 15, 2025
297 298 
1.200% senior notes, €300 principal amount, due July 7, 2026
324 362 
2.600% senior notes, £300 principal amount, due July 7, 2028
369 408 
4.000% senior notes, $300 principal amount, due April 15, 2038
294 294 
3.750% senior notes, $250 principal amount, due January 15, 2043
248 248 
4.500% senior notes, $500 principal amount, due July 15, 2045
488 488 
$2,269 $2,347 
Our short-term borrowings of $333 million as of April 30, 2020, and $312 million as of January 31, 2021, consisted primarily of borrowings under our commercial paper program.
(Dollars in millions)April 30,
2020		January 31,
2021
Commercial paper$333$290
Average interest rate1.29%0.27%
Average remaining days to maturity7333