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Employee Stock Ownership Plan (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]      
Shares in ESOP (in shares) 10,290,667 11,545,950  
Outstanding borrowings in the ESOP $ 1    
Common shares released and allocated to participant accounts (in shares) 9,559,255    
Common shares available for future allocation to participant accounts (in shares) 731,412    
Annual ESOP expense $ 0 $ 0 $ 0
Dividends paid by the Company on shares held by the ESOP 20 23 25
Company contributions to the ESOP $ 0 $ 0 $ 0