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Consolidated Statements of Changes in Common Shareholders' Equity - USD ($)
$ in Millions
Common Stock [Member]
Treasury Stock, Common [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
 [1]
Total
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 6,523 0 6,523
Other comprehensive income/(loss)   $ 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)        
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 6,998 0 6,998
Other comprehensive income/(loss)   $ 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
Net income 0 0 0 6,379 0 6,379
Other comprehensive income/(loss) $ 0 $ 0 0 0 (32) (32) [2]
Conversion, stock option exercises, forfeitures, ESPP, and other (in shares) 300,000 500,000        
Conversion, stock option exercises, forfeitures, ESPP, and other $ 0 $ 50 113 0 0 $ 163
Share repurchase programs (Note 18) (in shares) 0 (3,500,000)       (3,515,284)
Share repurchase programs (Note 18) $ 0 $ (712) 0 0 0 $ (712)
Cash dividends declared $ 0 $ 0 0 (3,173) 0 (3,173)
Balance (in shares) at Dec. 31, 2023 1,112,900,000 (503,200,000)        
Balance at Dec. 31, 2023 $ 2,782 $ (54,666) $ 5,193 $ 62,093 $ (614) $ 14,788
[1] AOCI = Accumulated Other Comprehensive Income/Loss (Note 9)
[2] Net of deferred taxes of $31 million, ($92) million, and ($237) million during 2023, 2022, and 2021, respectively.