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Consolidated Statements of Changes in Common Shareholders' Equity - USD ($)
$ in Millions
Common Stock [Member]
Treasury Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
 [1]
Total
Balance (in shares) at Dec. 31, 2019 1,112,000,000.0 (419,900,000)        
Balance at Dec. 31, 2019 $ 2,780 $ (36,424) $ 4,523 $ 48,605 $ (1,356) $ 18,128
Net income 0 0 0 5,349 0 5,349
Other comprehensive income/(loss) $ 0 $ 0 0 0 (237) (237) [2]
Conversion, stock option exercises, forfeitures, ESPP, and other (in shares) 200,000 1,100,000        
Conversion, stock option exercises, forfeitures, ESPP, and other $ 1 $ 19 31 0 0 51
Share repurchase programs (Note 18) (in shares) 0 (22,100,000)        
Share repurchase programs (Note 18) $ 0 $ (4,015) 310 0 0 (3,705)
Cash dividends declared $ 0 $ 0 0 (2,628) 0 (2,628)
Balance (in shares) at Dec. 31, 2020 1,112,200,000 (440,900,000)        
Balance at Dec. 31, 2020 $ 2,781 $ (40,420) 4,864 51,326 (1,593) 16,958
Net income 0 0 0 6,523 0 6,523
Other comprehensive income/(loss) $ 0 $ 0 0 0 679 679 [2]
Conversion, stock option exercises, forfeitures, ESPP, and other (in shares) 200,000 600,000        
Conversion, stock option exercises, forfeitures, ESPP, and other $ 0 $ 1 91 0 0 $ 92
Share repurchase programs (Note 18) (in shares) 0 (33,300,000)       (33,337,620)
Share repurchase programs (Note 18) $ 0 $ (7,315) 24 0 0 $ (7,291)
Cash dividends declared $ 0 $ 0 0 (2,800) 0 (2,800)
Balance (in shares) at Dec. 31, 2021 1,112,400,000 (473,600,000)        
Balance at Dec. 31, 2021 $ 2,781 $ (47,734) 4,979 55,049 (914) 14,161
Net income 0 0 0 6,998 0 6,998
Other comprehensive income/(loss) $ 0 $ 0 0 0 332 332 [2]
Conversion, stock option exercises, forfeitures, ESPP, and other (in shares) 200,000 500,000        
Conversion, stock option exercises, forfeitures, ESPP, and other $ 1 $ 0 113 0 0 $ 114
Share repurchase programs (Note 18) (in shares) 0 (27,100,000)       (27,106,890)
Share repurchase programs (Note 18) $ 0 $ (6,270) (12) 0 0 $ (6,282)
Cash dividends declared $ 0 $ 0 0 (3,160) 0 (3,160)
Balance (in shares) at Dec. 31, 2022 1,112,600,000 (500,200,000)        
Balance at Dec. 31, 2022 $ 2,782 $ (54,004) $ 5,080 $ 58,887 $ (582) $ 12,163
[1] AOCI = Accumulated Other Comprehensive Income/Loss (Note 9)
[2] Net of deferred taxes of ($92) million, ($237) million, and $75 million during 2022, 2021, and 2020, respectively.