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Share Repurchase Program (Purchase of Outstanding Shares) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Share Repurchase Program [Abstract] |  |  |  |
Number of shares purchased |  | 0.5 | 1.9 | 0.5
Average price paid per share | [1] | $ 46.11 | $ 30.51 | $ 46.11
Cost of share purchased |  | $ 25 | $ 59 | $ 25
[1] | The average price paid per share is calculated on a trade date basis and excludes commissions.

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