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Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Jan. 01, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash dividends declared        
Common stock, dividend per share (in dollars per share)   $ 1.72 $ 1.72 $ 1.64
Cumulative Effect, Period of Adoption, Adjustment        
Cash dividends declared        
Impact of new accounting guidance, net of tax $ 1,170      
Impact of new accounting guidance, tax $ 288      
Series B Preferred Stock        
Cash dividends declared        
Preferred stock, dividend per share (in dollars per share)   36,419.41 45,807.57 52,000
Series C Preferred Stock        
Cash dividends declared        
Preferred stock, dividend per share (in dollars per share)   26,317.47 $ 52,919.91 $ 49,000
Series D Preferred Stock        
Cash dividends declared        
Preferred stock, dividend per share (in dollars per share)   $ 13,213.89