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Summary of Significant Accounting Policies Cash and Equivalents (Details) - USD ($)
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]        
Certificates of Deposit, at Carrying Value $ 1,800,000,000      
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents $ 2,583,800,000 $ 4,709,200,000 $ 3,449,100,000 $ 898,500,000