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Shareholders' Equity And Net Income Per Share Dividends (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2021
Mandatory convertible preferred share cumulative dividends | $ 16 |  |  |  | $ 16 |
Preferred Stock |  |  |  |  |  |
Preferred Stock, Dividends, Per Share, Cash Paid | $ 1.375 | $ 1.375 | $ 1.375 | $ 1.375 | $ 1.375 | $ 5.500
Mandatory convertible preferred share cumulative dividends | $ 16 | $ 16 | $ 15 | $ 16 | $ 16 | $ 63

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