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Convertible Senior Notes, Net | 3 Months Ended
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Apr. 30, 2018
Debt Disclosure [Abstract] |
Convertible Senior Notes, Net | Convertible Senior Notes, Net Convertible Senior Notes In June 2013, we issued 0.75% convertible senior notes due July 15, 2018 with a principal amount of $350 million. The 2018 Notes are unsecured, unsubordinated obligations, and interest is payable in cash in arrears at a fixed rate of 0.75% on January 15 and July 15 of each year. The 2018 Notes mature on July 15, 2018 unless repurchased or converted in accordance with their terms prior to such date. We cannot redeem the 2018 Notes prior to maturity. Concurrently, we issued 1.50% convertible senior notes due July 15, 2020 with a principal amount of $250 million. The 2020 Notes are unsecured, unsubordinated obligations, and interest is payable in cash in arrears at a fixed rate of 1.50% on January 15 and July 15 of each year. The 2020 Notes mature on July 15, 2020 unless repurchased or converted in accordance with their terms prior to such date. We cannot redeem the 2020 Notes prior to maturity. In September 2017, we issued 0.25% convertible senior notes due October 1, 2022 with a principal amount of $1.15 billion. The 2022 Notes are unsecured, unsubordinated obligations, and interest is payable in cash in arrears at a fixed rate of 0.25% on April 1 and October 1 of each year. The 2022 Notes mature on October 1, 2022 unless repurchased or converted in accordance with their terms prior to such date. We cannot redeem the 2022 Notes prior to maturity. The terms of the Notes are governed by Indentures by and between us and Wells Fargo Bank, National Association, as Trustee (the "Indentures"). Upon conversion, holders of the Notes will receive cash, shares of Class A common stock, or a combination of cash and shares of Class A common stock, at our election. For the 2018 Notes, the initial conversion rate is 12.0075 shares of Class A common stock per $1,000 principal amount, which is equal to an initial conversion price of approximately $83.28 per share of Class A common stock, subject to adjustment. For the 2020 Notes, the initial conversion rate is 12.2340 shares of Class A common stock per $1,000 principal amount, which is equal to an initial conversion price of approximately $81.74 per share of Class A common stock, subject to adjustment. Prior to the close of business on March 13, 2020, the conversion is subject to the satisfaction of certain conditions, as described below. For the 2022 Notes, the initial conversion rate is 6.7982 shares of Class A common stock per $1,000 principal amount, which is equal to an initial conversion price of approximately $147.10 per share of Class A common stock, subject to adjustment. Prior to the close of business on May 31, 2022, the conversion is subject to the satisfaction of certain conditions, as described below. Holders of the Notes who convert their Notes in connection with certain corporate events that constitute a make-whole fundamental change (as defined in the Indentures) are, under certain circumstances, entitled to an increase in the conversion rate. Additionally, in the event of a corporate event that constitutes a fundamental change (as defined in the Indentures), holders of the Notes may require us to repurchase all or a portion of their Notes at a price equal to 100% of the principal amount of the Notes, plus any accrued and unpaid interest. Holders of the 2020 Notes and 2022 Notes may convert all or a portion of their Notes prior to the close of business on March 13, 2020 and May 31, 2022, respectively, in multiples of $1,000 principal amount, only under the following circumstances:
• | if the last reported sale price of Class A common stock for at least 20 trading days during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the conversion price of the respective Notes on each applicable trading day;
• | during the five business day period after any five consecutive trading day period in which the trading price per $1,000 principal amount of the respective Notes for each day of that five day consecutive trading day period was less than 98% of the product of the last reported sale price of Class A common stock and the conversion rate of the respective Notes on such trading day; or
• | upon the occurrence of specified corporate events, as noted in the Indentures.
On or after March 15, 2018 for the 2018 Notes, March 15, 2020 for the 2020 Notes, and June 1, 2022 for the 2022 Notes, holders of the Notes may convert their Notes at any time until the close of business on the second scheduled trading day immediately preceding the respective maturity date of their Notes. In accounting for the issuance of the Notes, we separated each of the Notes into liability and equity components. The carrying amounts of the liability components were calculated by measuring the fair value of similar liabilities that do not have associated convertible features. The carrying amount of the equity components representing the conversion option were determined by deducting the fair value of the liability components from the par value of the respective Notes. These differences represent debt discounts that are amortized to interest expense over the respective terms of the Notes using the effective interest rate method. The equity components are not remeasured as long as they continue to meet the conditions for equity classification. In accounting for the issuance costs related to the Notes, we allocated the total amount of issuance costs incurred to liability and equity components based on their relative values. Issuance costs attributable to the liability components are being amortized on a straight-line basis, which approximates the effective interest rate method, to interest expense over the respective terms of the Notes. The issuance costs attributable to the equity components were netted against the respective equity components in Additional paid-in capital. For the 2018 Notes, we recorded liability issuance costs of $7 million and equity issuance costs of $2 million. Amortization expense for the liability issuance costs was $0.4 million for each of the three month periods ended April 30, 2018 and 2017. For the 2020 Notes, we recorded liability issuance costs of $5 million and equity issuance costs of $2 million. Amortization expense for the liability issuance costs was $0.2 million for each of the three month periods ended April 30, 2018 and 2017. For the 2022 Notes, we recorded liability issuance costs of $14 million and equity issuance costs of $4 million. Amortization expense for the liability issuance costs was $0.7 million for the three months ended April 30, 2018. The Notes, net consisted of the following (in thousands):
| April 30, 2018 |  | January 31, 2018
| 2018 Notes |  | 2020 Notes |  | 2022 Notes |  | 2018 Notes |  | 2020 Notes |  | 2022 Notes
Principal amounts: |  |  |  |  |  |  |  |  |  |  |
Principal | $ | 350,000 |  |  | $ | 250,000 |  |  | $ | 1,150,000 |  |  | $ | 350,000 |  |  | $ | 250,000 |  |  | $ | 1,150,000 |
Unamortized debt discount | (3,567 | ) |  | (24,407 | ) |  | (198,127 | ) |  | (7,850 | ) |  | (26,968 | ) |  | (208,188 | )
Unamortized debt issuance costs | (289 | ) |  | (1,486 | ) |  | (12,631 | ) |  | (641 | ) |  | (1,654 | ) |  | (13,345 | )
Net carrying amount | $ | 346,144 |  |  | $ | 224,107 |  |  | $ | 939,242 |  |  | $ | 341,509 |  |  | $ | 221,378 |  |  | $ | 928,467 |
Carrying amount of the equity component (1) | $ | 74,892 |  |  | $ | 66,007 |  |  | $ | 219,702 |  |  | $ | 74,892 |  |  | $ | 66,007 |  |  | $ | 219,702 |
(1) | Included on the condensed consolidated balance sheets within Additional paid-in capital, net of $2 million, $2 million, and $4 million for the 2018 Notes, 2020 Notes, and 2022 Notes, respectively, in equity issuance costs.
As of April 30, 2018, the 2018 Notes, 2020 Notes, and 2022 Notes have remaining lives of approximately 2 months, 26 months, and 53 months, respectively. The 2018 Notes were convertible beginning on March 15, 2018 and are classified as current liabilities on the condensed consolidated balance sheets as they are due within one year. As of the date of this filing, the note holders of the 2018 Notes have not submitted requests for conversion. For more than 20 trading days during the 30 consecutive trading days ended April 30, 2018, the last reported sale price of our Class A common stock exceeded 130% of the conversion price of the 2020 Notes. As a result, the 2020 Notes are convertible at the option of the holders during the second quarter of fiscal 2019. Accordingly, the 2020 Notes are classified as current on the condensed consolidated balance sheet as of April 30, 2018. As of the date of this filing, the note holders of the 2020 Notes have not submitted requests for conversion. The effective interest rates of the liability components of the 2018 Notes, 2020 Notes, and 2022 Notes are 5.75%, 6.25%, and 4.60% respectively. These interest rates were based on the interest rates of similar liabilities at the time of issuance that did not have associated convertible features. The following table sets forth total interest expense recognized related to the Notes (in thousands):
| Three Months Ended April 30,
| 2018 |  | 2017
| 2018 Notes |  | 2020 Notes |  | 2022 Notes |  | 2018 Notes |  | 2020 Notes |  | 2022 Notes
Contractual interest expense | $ | 656 |  |  | $ | 937 |  |  | $ | 719 |  |  | $ | 656 |  |  | $ | 938 |  |  | $ | — |
Interest cost related to amortization of debt issuance costs | 352 |  |  | 168 |  |  | 714 |  |  | 352 |  |  | 168 |  |  | — |
Interest cost related to amortization of the debt discount | 4,283 |  |  | 2,561 |  |  | 10,061 |  |  | 4,044 |  |  | 2,406 |  |  | — |
We capitalized interest costs related to the Notes of $2 million and $1 million for the three months ended April 30, 2018 and 2017, respectively. Notes Hedges In connection with the issuance of the Notes, we entered into convertible note hedge transactions with respect to our Class A common stock ("Purchased Options"). The Purchased Options relating to the 2018 Notes give us the option to purchase, subject to anti-dilution adjustments substantially identical to those in the 2018 Notes, approximately 4.2 million shares of our Class A common stock for $83.28 per share, exercisable upon conversion of the 2018 Notes. The Purchased Options relating to the 2020 Notes give us the option to purchase, subject to anti-dilution adjustments substantially identical to those in the 2020 Notes, approximately 3.1 million shares of our Class A common stock for $81.74 per share, exercisable upon conversion of the 2020 Notes. The Purchased Options relating to the 2022 Notes give us the option to purchase, subject to anti-dilution adjustments substantially identical to those in the 2022 Notes, approximately 7.8 million shares of our Class A common stock for $147.10 per share, exercisable upon conversion of the 2022 Notes. The Purchased Options will expire in 2018 for the 2018 Notes, in 2020 for the 2020 Notes, and in 2022 for the 2022 Notes, if not exercised earlier. The Purchased Options are intended to offset potential economic dilution to our Class A common stock upon any conversion of the Notes. The Purchased Options are separate transactions and are not part of the terms of the Notes. We paid an aggregate amount of $144 million for the Purchased Options relating to the 2018 Notes and 2020 Notes, and $176 million for the Purchased Options relating to the 2022 Notes. The amount paid for the Purchased Options is included in Additional paid-in capital on the condensed consolidated balance sheets. Warrants In connection with the issuance of the Notes, we also entered into warrant transactions to sell warrants ("Warrants") to acquire, subject to anti-dilution adjustments, up to approximately 4.2 million shares over 60 scheduled trading days beginning in October 2018, 3.1 million shares over 60 scheduled trading days beginning in October 2020, and 7.8 million shares over 60 scheduled trading days beginning in January 2023 of our Class A common stock at an exercise price of $107.96, $107.96, and $213.96 per share, respectively. If the Warrants are not exercised on their exercise dates, they will expire. If the market value per share of our Class A common stock exceeds the applicable exercise price of the Warrants, the Warrants will have a dilutive effect on our earnings per share assuming that we are profitable. The Warrants are separate transactions, and are not part of the terms of the Notes or the Purchased Options. We received aggregate proceeds of $93 million from the sale of the Warrants related to the 2018 Notes and the 2020 Notes, and $81 million from the sale of the Warrants related to the 2022 Notes. The proceeds from the sale of the Warrants are recorded in Additional paid-in capital on the condensed consolidated balance sheets.

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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