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Stockholders' Equity - Stock Repurchase Program (Details) shares in Millions | Dec. 31, 2020 USD ($) shares
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Class of Stock [Line Items] |
Number of shares repurchased (in shares) | shares | 3,314
Aggregate cost for shares repurchased | $ 14,408,000,000
Remaining amount authorized under the stock repurchase program | 1,592,000,000
Common Stock |
Class of Stock [Line Items] |
Stock repurchase program, aggregate authorized amount | $ 16,000,000,000

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