Stockholders' Equity (Details 1) - USD ($) |
3 Months Ended | 6 Months Ended | ||||
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Aug. 31, 2019 |
Aug. 31, 2019 |
Aug. 31, 2018 |
May 31, 2018 |
Aug. 31, 2019 |
Jan. 31, 2018 |
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| Equity, Class of Treasury Stock [Line Items] | ||||||
| Dollar Value of Shares Repurchased | $ 50,000,000.0 | $ 404,300,000 | $ 100,000,000.0 | |||
| Class A and Class B [Member] | 2018 Authorization [Member] | ||||||
| Equity, Class of Treasury Stock [Line Items] | ||||||
| Repurchase Authorization | $ 3,000,000,000.0 | |||||
| Class A Common Stock [Member] | 2018 Authorization [Member] | ||||||
| Equity, Class of Treasury Stock [Line Items] | ||||||
| Dollar Value of Shares Repurchased | $ 1,045,900,000 | $ 50,000,000.0 | ||||
| Number of Shares Repurchased | 4,897,605 | 265,593 | ||||
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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. No definition available.
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- Definition Amount of stock repurchase plan authorized. No definition available.
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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