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Accounting Policies and Supplemental Disclosures - Calculation of Diluted Shares (Details) - shares
shares in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Accounting Policies [Abstract]        
Shares used in computation of basic earnings per share (in shares) 10,447 10,285 10,420 10,268
Total dilutive effect of outstanding stock awards (in shares) 261 164 269 130
Shares used in computation of diluted earnings per share (in shares) 10,708 10,449 10,689 10,398