Segment Information - Reportable Segments and Reconciliation to Consolidated Net Income (Details) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) segment	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment			3
Segment Reporting Disclosure [Line Items]
Net sales	$ 158,877	$ 143,083	$ 450,167	$ 404,824
Operating expenses	141,466	131,895	402,777	381,181
Operating income	17,411	11,188	47,390	23,643
Total non-operating income (expense)	626	1,001	(1,125)	228
Provision for income taxes	(2,706)	(2,306)	(6,940)	(4,058)
Equity-method investment activity, net of tax	(3)	(4)	(81)	(12)
Net income	15,328	9,879	39,244	19,801	$ 49,868	$ 20,079
North America
Segment Reporting Disclosure [Line Items]
Net sales	95,537	87,887	271,911	247,314
Operating expenses	89,874	83,580	256,200	238,898
Operating income	5,663	4,307	15,711	8,416
International
Segment Reporting Disclosure [Line Items]
Net sales	35,888	32,137	99,486	90,957
Operating expenses	34,587	32,232	97,009	93,194
Operating income	1,301	(95)	2,477	(2,237)
AWS
Segment Reporting Disclosure [Line Items]
Net sales	27,452	23,059	78,770	66,553
Operating expenses	17,005	16,083	49,568	49,089
Operating income	$ 10,447	$ 6,976	$ 29,202	$ 17,464