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Common Stock (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Nov. 30, 2019
Equity, Class of Treasury Stock [Line Items] |  |  |
Value of repurchased shares | $ 1,200,000,000 |  |
Shares issued in period (in shares) | 3,800,000 | 4,100,000 |
Common stock |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Stock repurchase program, authorized amount |  |  | $ 2,500,000,000
Common stock repurchased (in shares) | 7,900,000 |  |
Value of repurchased shares |  | $ 0 |
Stock repurchase program, remaining authorized repurchase amount | $ 1,300,000,000 |  |

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