Accounting Policies and Supplemental Disclosures - Calculation of Diluted Shares (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Accounting Policies [Abstract]
Shares used in computation of basic earnings per share (in shares)	10,322	10,191	10,286	10,178
Total dilutive effect of outstanding stock awards (in shares)	236	140	166	0
Shares used in computation of diluted earnings per share (in shares)	10,558	10,331	10,452	10,178