Accounting Policies and Supplemental Disclosures - Calculation of Diluted Shares (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Accounting Policies [Abstract]
Shares used in computation of basic earnings per share (in shares)	10,637	10,447	10,620	10,420
Total dilutive effect of outstanding stock awards (in shares)	169	261	180	269
Shares used in computation of diluted earnings per share (in shares)	10,806	10,708	10,800	10,689