Convertible Senior Notes - Additional Information (Details)
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1 Months Ended |
3 Months Ended |
6 Months Ended |
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Sep. 30, 2020
USD ($)
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Sep. 24, 2020
USD ($)
d
$ / shares
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Sep. 30, 2021
USD ($)
d
$ / shares
shares
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Jan. 31, 2018
USD ($)
d
$ / shares
shares
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Jan. 31, 2022
USD ($)
d
$ / shares
shares
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Jan. 31, 2022
USD ($)
$ / shares
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Jan. 31, 2021
USD ($)
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Oct. 31, 2021
USD ($)
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Sep. 22, 2021
USD ($)
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Sep. 15, 2021
USD ($)
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Jul. 31, 2021
USD ($)
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| Debt Instrument [Line Items] |
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| Payments for unwinding of warrants |
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$ (18,390,000)
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$ 0
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| Proceeds from unwinding of convertible note hedges |
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39,880,000
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0
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| Loss on debt extinguishment |
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(64,910,000)
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0
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| Proceeds from the issuance of convertible notes, net of issuance costs |
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89,128,000
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$ 723,617,000
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| Derivative liability |
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$ 0
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0
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$ 0
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$ 698,213,000
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$ 500,175,000
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| 2023 Convertible Senior Notes |
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| Debt Instrument [Line Items] |
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| Loss on debt extinguishment |
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$ 64,900,000
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| Number of securities called by warrants or rights (in shares) | shares |
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11,800,000
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| Payments for convertible note hedges |
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$ 143,200,000
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| Exercise price of warrants (in dollars per share) | $ / shares |
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$ 73.46
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$ 73.46
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$ 73.46
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| Proceeds from issuance of warrants |
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$ 88,000,000.0
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| Transaction cost |
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$ 55,200,000
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| Dilutive effect of $10 increase in share price (in shares) | shares |
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400,000
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| Dilutive effect of warrants (in shares) | shares |
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2,100,000
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| Share price threshold for dilutive effect of warrants (in dollars per share) | $ / shares |
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$ 83.46
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83.46
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| 2023 Convertible Senior Notes | Common Class A |
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| Debt Instrument [Line Items] |
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| Share price (in dollars per share) | $ / shares |
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$ 27.34
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$ 27.34
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| 2027 Convertible Senior Notes |
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| Debt Instrument [Line Items] |
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| Interest rate, stated percentage |
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0.25%
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0.25%
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| Convertible Debt | 2023 Convertible Senior Notes |
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| Debt Instrument [Line Items] |
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| Interest rate, stated percentage |
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0.00%
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0.00%
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0.00%
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| Face amount |
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$ 575,000,000.0
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| Principal amount |
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575,000,000
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$ 145,704,000
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$ 145,704,000
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575,000,000
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| Debt outstanding |
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$ 145,700,000
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| Convertible debt |
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$ 416,500,000
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$ 75,000,000.0
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| Repurchase amount |
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12,800,000
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| Proceeds from unwind transactions |
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21,500,000
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| Payments for unwinding of warrants |
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(18,400,000)
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| Proceeds from unwinding of convertible note hedges |
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$ 39,900,000
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| Conversion ratio |
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2,047.0500
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| Conversion price (in dollars per share) | $ / shares |
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$ 48.85
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| Threshold trading days | d |
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20
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20
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| Threshold consecutive trading days | d |
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30
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30
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| Threshold percentage of stock price trigger |
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130.00%
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130.00%
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| Redemption price, percentage |
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100.00%
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| Unamortized discount, net |
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$ 10,781,000
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| Less: other issuance costs |
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707,000
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| Transaction costs attributable to equity component |
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3,000,000.0
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| Debt instrument, term |
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11 months
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| Payments for convertible note hedges |
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143,175,000
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| Proceeds from issuance of warrants |
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$ 87,975,000
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| Convertible Debt | 2023 Convertible Senior Notes | Common Class A |
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| Debt Instrument [Line Items] |
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| Threshold percentage of stock price trigger |
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98.00%
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| Convertible Debt | 2026 Convertible Senior Notes |
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| Debt Instrument [Line Items] |
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| Interest rate, stated percentage |
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2.50%
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2.50%
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2.50%
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| Face amount |
$ 750,000,000.0
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| Principal amount |
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$ 750,000,000
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$ 750,000,000
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$ 750,000,000
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| Conversion ratio |
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0.036036
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| Conversion price (in dollars per share) | $ / shares |
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$ 27.75
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$ 27.75
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| Threshold trading days | d |
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20
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| Threshold consecutive trading days | d |
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30
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| Threshold percentage of stock price trigger |
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150.00%
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| Redemption price, percentage |
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100.00%
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| Debt instrument, term |
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4 years 7 months 6 days
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| Proceeds from the issuance of convertible notes, net of issuance costs |
723,700,000
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| Payments of debt issuance costs |
$ 26,300,000
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| Debt instrument, principal amount for conversion into common stock |
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$ 1,000
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| Derivative liability |
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$ 230,900,000
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$ 698,200,000
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| Convertible Debt | 2027 Convertible Senior Notes |
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| Debt Instrument [Line Items] |
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| Interest rate, stated percentage |
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0.25%
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0.25%
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0.25%
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| Face amount |
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$ 575,000,000
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| Principal amount |
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$ 575,000,000
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$ 575,000,000
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| Convertible debt |
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477,300,000
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| Debt instrument for cash, net |
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88,400,000
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| Notes for cash |
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97,700,000
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| Repurchase amount |
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$ 14,700,000
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| Conversion ratio |
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17.3192
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| Conversion price (in dollars per share) | $ / shares |
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$ 57.74
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| Threshold trading days | d |
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20
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| Threshold consecutive trading days | d |
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30
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| Redemption price, percentage |
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100.00%
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| Debt instrument, term |
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5 years 8 months 12 days
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| Debt instrument, principal amount for conversion into common stock |
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$ 1,000
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| Convertible Debt | 2027 Convertible Senior Notes | Minimum |
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| Debt Instrument [Line Items] |
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| Threshold percentage of stock price trigger |
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130.00%
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| Convertible Debt | 2027 Convertible Senior Notes | Common Class A |
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| Debt Instrument [Line Items] |
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| Repurchase amount |
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$ 58,500,000
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| Number of share repurchase | shares |
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1,400,000
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| Convertible Debt | 2027 Convertible Senior Notes | Common Class A | Maximum |
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| Debt Instrument [Line Items] |
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| Threshold percentage of stock price trigger |
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98.00%
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| Convertible Debt | Exchange Transactions | 2023 Convertible Senior Notes |
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| Debt Instrument [Line Items] |
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| Face amount |
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416,500,000
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| Convertible Debt | Exchange Transactions | 2027 Convertible Senior Notes |
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| Debt Instrument [Line Items] |
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| Face amount |
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477,300,000
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| Convertible Debt | Cash Transaction | 2023 Convertible Senior Notes |
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| Debt Instrument [Line Items] |
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| Repurchase amount |
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$ 12,800,000
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