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Equity Equity Repurchase Program (Details) - USD ($) shares in Millions, $ in Millions | 1 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Oct. 27, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Oct. 01, 2021 | Apr. 01, 2021 | Jan. 01, 2021
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Value of shares acquired |  | $ 1,200 | $ 150 |  |  |
Number of shares acquired |  | 19.0 | 2.7 |  |  |
Stock repurchase authorization amount |  |  |  | $ 3,000 | $ 2,500 | $ 1,500
Subsequent Event [Member] |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Value of shares acquired | $ 108 |  |  |  |  |
Number of shares acquired | 1.5 |  |  |  |  |

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