Borrowing Arrangements - Fair Value of Market Price (Details) - Senior Notes - USD ($) |
Jan. 31, 2024 |
Oct. 31, 2021 |
Jan. 31, 2020 |
Jun. 30, 2017 |
Jun. 30, 2015 |
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| 2015 Notes | |||||
| Debt Instrument [Line Items] | |||||
| Aggregate Principal Amount | $ 300,000,000 | $ 300,000,000 | |||
| Fair value | 298,000,000 | ||||
| 2017 Notes | |||||
| Debt Instrument [Line Items] | |||||
| Aggregate Principal Amount | 500,000,000 | $ 500,000,000 | |||
| Fair value | 484,000,000 | ||||
| 2020 Notes | |||||
| Debt Instrument [Line Items] | |||||
| Aggregate Principal Amount | 500,000,000 | $ 500,000,000 | |||
| Fair value | 450,000,000 | ||||
| 2021 Notes | |||||
| Debt Instrument [Line Items] | |||||
| Aggregate Principal Amount | 1,000,000,000 | $ 1,000,000,000 | |||
| Fair value | $ 846,000,000 |
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- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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