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v3.21.1

Subsequent Events (Details) - USD ($) $ in Thousands, shares in Millions | 1 Months Ended | 2 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 31, 2021 | Mar. 31, 2021 | Mar. 25, 2021 | Jul. 31, 2021 | Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2019
Subsequent Event [Line Items] |  |  |  |  |  |  |
Repayments of convertible debt |  |  |  |  | $ 384,199 | $ 0 | $ 0
Stock issued as repayment of convertible debt, value |  |  |  |  |  |  | $ 524,979
Convertible Debt | Convertible Senior Notes Due 2023 |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Debt conversion, converted instrument, amount | $ 23,900 |  |  |  | 1,700,000 |  |
Repayments of convertible debt |  |  |  |  | 460,000 |  |
Cash payments to extinguish debt |  |  |  |  | $ 459,200 |  |
Stock issued as repayment of convertible debt (in shares) |  |  |  |  | 4.7 |  |
Stock issued as repayment of convertible debt, value |  |  |  |  | $ 1,200,000 |  |
Subsequent Event | Convertible Debt | Convertible Senior Notes Due 2023 |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Debt conversion, converted instrument, amount |  | $ 12,800 | $ 72,300 | $ 6,600 |  |  |
Repayments of convertible debt |  |  | 23,900 |  |  |  |
Cash payments to extinguish debt |  |  | $ 23,900 |  |  |  |
Stock issued as repayment of convertible debt (in shares) |  |  | 0.2 |  |  |  |
Stock issued as repayment of convertible debt, value |  |  | $ 48,400 |  |  |  |

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- Definition The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4332-108586 + Details
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- Definition Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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