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Borrowing Arrangements (Tables) | 3 Months Ended
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Apr. 30, 2021
Debt Disclosure [Abstract] |
Schedule of Fair Value of Market Price | Based on the quoted market prices, the approximate fair value of the notes as of April 30, 2021, were as follows:
| Aggregate Principal Amount |  | Fair value
2012 Notes | $ | 350.0 |  |  | $ | 364.6 |
2015 Notes | 300.0 |  |  | 335.7 |
2017 Notes | 500.0 |  |  | 551.3 |
2020 Notes | 500.0 |  |  | 522.3 |
Summary of Future Minimum Payments for Borrowings | The expected future principal payments for all borrowings as of April 30, 2021, is as follows (in millions):
Fiscal year ending |  |  |  |  |  |  |
2022 (remainder) | $ | — |  |  |  |  |  |  |
2023 | 350.0 |  |  |  |  |  |  |
2024 | — |  |  |  |  |  |  |
2025 | — |  |  |  |  |  |  |
2026 | 300.0 |  |  |  |  |  |  |
Thereafter | 1,000.0 |  |  |  |  |  |  |
Total principal outstanding | $ | 1,650.0 |  |  |  |  |  |  |

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