Financing and Leases - Schedule of Shares Used to Compute Diluted Earnings Per Share (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Debt Disclosure [Abstract]
As reported shares (in shares)	1,082	1,061	1,070	1,060
Effect of stock-based compensation (in shares)	6	7	6	7
Diluted (in shares)	1,088	1,068	1,076	1,067