Equity - Summary of Common Stock Purchases (Details) - USD ($) shares in Millions, $ in Millions |
12 Months Ended | ||
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Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Equity [Abstract] | |||
| Shares of common stock purchased | 213 | 307 | 150 |
| Cost of purchase | $ 8,865 | $ 12,198 | $ 5,000 |
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- References 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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