XML 36 R25.htm IDEA: XBRL DOCUMENT v3.21.1
Accounting Policies and Supplemental Disclosures - Calculation of Diluted Shares (Details) - shares
shares in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Accounting Policies [Abstract]    
Shares used in computation of basic earnings per share (in shares) 504 498
Total dilutive effect of outstanding stock awards (in shares) 9 8
Shares used in computation of diluted earnings per share (in shares) 513 506