XML 88 R67.htm IDEA: XBRL DOCUMENT v3.20.4
Earnings per share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income (Numerator):                      
Net income for basic and diluted EPS $ 1,615 $ 2,021 $ 1,803 $ 1,825 $ 1,703 $ 1,968 $ 2,179 $ 1,992 $ 7,264 $ 7,842 $ 8,394
Shares (Denominator):                      
Weighted-average shares for basic EPS                 586 605 661
Effect of dilutive securities (in shares)                 4 4 4
Weighted-average shares for diluted EPS                 590 609 665
Basic EPS (in usd per share) $ 2.78 $ 3.45 $ 3.07 $ 3.09 $ 2.87 $ 3.29 $ 3.59 $ 3.20 $ 12.40 $ 12.96 $ 12.70
Diluted EPS (in usd per share) $ 2.76 $ 3.43 $ 3.05 $ 3.07 $ 2.85 $ 3.27 $ 3.57 $ 3.18 $ 12.31 $ 12.88 $ 12.62