Segment Information - Reportable Segments and Reconciliation to Consolidated Net Income (Details) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) segment	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment			3
Segment Reporting Disclosure [Line Items]
Net sales	$ 180,169	$ 158,877	$ 503,538	$ 450,167
Operating expenses	162,747	141,466	448,540	402,777
Operating income	17,422	17,411	54,998	47,390
Total non-operating income (expense)	10,748	626	15,708	(1,125)
Provision for income taxes	(6,910)	(2,706)	(14,141)	(6,940)
Equity-method investment activity, net of tax	(73)	(3)	(87)	(81)
Net income	21,187	15,328	56,478	39,244	$ 76,482	$ 49,868
North America
Segment Reporting Disclosure [Line Items]
Net sales	106,267	95,537	299,222	271,911
Operating expenses	101,478	89,874	281,075	256,200
Operating income	4,789	5,663	18,147	15,711
International
Segment Reporting Disclosure [Line Items]
Net sales	40,896	35,888	111,170	99,486
Operating expenses	39,697	34,587	107,460	97,009
Operating income	1,199	1,301	3,710	2,477
AWS
Segment Reporting Disclosure [Line Items]
Net sales	33,006	27,452	93,146	78,770
Operating expenses	21,572	17,005	60,005	49,568
Operating income	$ 11,434	$ 10,447	$ 33,141	$ 29,202