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Convertible Senior Notes, Net (Tables)
 12 Months Ended
Jan. 31, 2025
Debt Disclosure [Abstract]  
Schedule of Debt
The net carrying amount of the 2025 Notes consisted of the following:
As of January 31,
20252024
(dollars in millions)
Principal$510 $552 
Less: unamortized debt issuance costs
(1)(3)
Net carrying amount$509 $549 
The net carrying amount of the 2026 Notes consisted of the following:
As of January 31,
20252024
(dollars in millions)
Principal$350 $608 
Less: unamortized debt issuance costs
(1)(3)
Net carrying amount$349 $605 
Schedule of Carrying Amounts and Estimated Fair Values of Convertible Note
The following table presents the principal amounts and estimated fair values of financial instruments that are not recorded at fair value on the consolidated balance sheets:
As of January 31, 2025
Principal Amount
Estimated Fair Value
(dollars in millions)
2025 convertible senior notes$510 $494 
2026 convertible senior notes$350 $329