Accounting Policies and Supplemental Disclosures - Calculation of Diluted Shares (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accounting Policies [Abstract]
Shares used in computation of basic earnings per share (in shares)	10,191	10,132	10,178	10,103
Total dilutive effect of outstanding stock awards (in shares)	140	177	0	184
Shares used in computation of diluted earnings per share (in shares)	10,331	10,309	10,178	10,287