Shareholders' Equity (Deficit) - Narrative (Details) - USD ($) shares in Millions	1 Months Ended				3 Months Ended		9 Months Ended		126 Months Ended
	Feb. 18, 2022	Nov. 30, 2020	Jun. 30, 2017	Nov. 30, 2014	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Apr. 30, 2012
Equity [Abstract]
Share repurchase authorization amount					$ 27,500,000,000		$ 27,500,000,000		$ 27,500,000,000	$ 5,000,000,000
Share repurchase authorization amount, increase during period	$ 7,500,000,000	$ 5,000,000,000	$ 5,000,000,000	$ 5,000,000,000
Share repurchase, remaining authorized repurchase amount					$ 6,700,000,000		$ 6,700,000,000		$ 6,700,000,000
Shares purchased (in shares)					4.2	4.4	8.7	5.7	158.4
Total cost of shares purchased					$ 1,200,000,000	$ 1,251,000,000	$ 2,528,000,000	$ 1,543,000,000	$ 20,800,000,000
Antidilutive securities excluded from computation of earnings per share (in shares)					1.0	1.5	0.9	0.0