Segment Information - Reportable Segments and Reconciliation to Consolidated Net Income (Details) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) segment	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment			3
Segment Reporting Disclosure [Line Items]
Net sales	$ 143,083	$ 127,101	$ 404,824	$ 364,779
Operating expenses	131,895	124,576	381,181	355,268
Operating income (loss)	11,188	2,525	23,643	9,511
Total non-operating income (expense)	1,001	419	228	(14,485)
Benefit (provision) for income taxes	(2,306)	(69)	(4,058)	1,990
Equity-method investment activity, net of tax	(4)	(3)	(12)	(16)
Net income (loss)	9,879	2,872	19,801	(3,000)	$ 20,079	$ 11,323
North America
Segment Reporting Disclosure [Line Items]
Net sales	87,887	78,843	247,314	222,517
Operating expenses	83,580	79,255	238,898	225,124
Operating income (loss)	4,307	(412)	8,416	(2,607)
International
Segment Reporting Disclosure [Line Items]
Net sales	32,137	27,720	90,957	83,544
Operating expenses	32,232	30,186	93,194	89,062
Operating income (loss)	(95)	(2,466)	(2,237)	(5,518)
AWS
Segment Reporting Disclosure [Line Items]
Net sales	23,059	20,538	66,553	58,718
Operating expenses	16,083	15,135	49,089	41,082
Operating income (loss)	$ 6,976	$ 5,403	$ 17,464	$ 17,636