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Share Repurchases (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2021 | Nov. 02, 2021 | May 04, 2021 | Nov. 04, 2020 | Feb. 06, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share repurchase program, open market | 21 |  |  |  |
Share repurchase program, open market, average price per share | $ 61.52 |  |  |  |
Share repurchase program, remaining authorized repurchase amount | $ 500 |  |  |  |
2020 Share Repurchase Program |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  | $ 200
2020 Share Repurchase Program Expansion |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  | $ 300 |
First 2021 Share Repurchase Program |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock repurchase program, authorized amount |  |  | $ 1,000 |  |
Second 2021 Share Repurchase Program |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock repurchase program, authorized amount |  | $ 500 |  |  |

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