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General Adoption of New Accounting Pronouncements (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative Effect on Retained Earnings, Net of Tax $ (56,698) $ (59,714) $ (59,076)  
Retained Earnings [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative Effect on Retained Earnings, Net of Tax $ (47,148) $ (47,365) $ (41,637) $ (39,337)