Stockholders' Equity - Schedule of Repurchase Agreements (Details) - USD ($) shares in Millions, $ in Millions |
3 Months Ended | 6 Months Ended | ||||
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Jun. 30, 2019 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
Dec. 31, 2018 |
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| Shares Repurchase Activity [Line Items] | ||||||
| Amount | $ 898 | $ 22 | $ 317 | $ 1,502 | ||
| Treasury stock value | $ 28 | $ 28 | $ 0 | |||
| Open Market | ||||||
| Shares Repurchase Activity [Line Items] | ||||||
| Shares (in shares) | 259 | 56 | ||||
| Amount | $ 1,502 | $ 317 | ||||
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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 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 The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its 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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- Details
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