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Description Of Business And Basis Of Presentation Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2021
FY21 Change in Estimated Offering Period [Member] |  |
Change in Accounting Estimate [Line Items] |  |
Increase in Net Revenue due to Change in Estimated Offering Period | $ 125,000,000 | $ 102,000,000
Increase in Net Income due to Change in Estimated Offering Period | 95,000,000 | 77,000,000
Increase in Diluted Earnings Per Share due to Change in Estimated Offering Period | 0.33 | $ 0.27
FY22 Change in Estimated Offering Period [Member] |  |
Change in Accounting Estimate [Line Items] |  |
Decrease in Net Revenue due to Change in Estimated Offering Period | 17,000,000 |
Decrease in Net Income due to Change in Estimated Offering Period | 13,000,000 |
Decrease in Diluted Earnings Per Share due to Change in Estimated Offering Period | $ 0.05 |

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