Segment Information - Reportable Segments and Reconciliation to Consolidated Net Income (Details) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) segment	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment			3
Segment Reporting Disclosure [Line Items]
Net sales	$ 113,080	$ 88,912	$ 221,598	$ 164,364
Operating expenses	105,378	83,069	205,031	154,532
Operating income	7,702	5,843	16,567	9,832
Total non-operating income (expense)	932	378	2,335	(228)
Provision for income taxes	(868)	(984)	(3,024)	(1,729)
Equity-method investment activity, net of tax	12	6	7	(97)
Net income	7,778	5,243	15,885	7,778	$ 29,438	$ 13,180
North America
Segment Reporting Disclosure [Line Items]
Net sales	67,550	55,436	131,916	101,563
Operating expenses	64,403	53,295	125,319	98,111
Operating income	3,147	2,141	6,597	3,452
International
Segment Reporting Disclosure [Line Items]
Net sales	30,721	22,668	61,370	41,774
Operating expenses	30,359	22,323	59,756	41,826
Operating income	362	345	1,614	(52)
AWS
Segment Reporting Disclosure [Line Items]
Net sales	14,809	10,808	28,312	21,027
Operating expenses	10,616	7,451	19,956	14,595
Operating income	$ 4,193	$ 3,357	$ 8,356	$ 6,432