Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Cash Flows [Abstract]
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, BEGINNING OF PERIOD	$ 37,842	$ 22,965	$ 36,410	$ 32,173	$ 23,554	$ 21,032
OPERATING ACTIVITIES:
Net income	6,331	2,134	14,109	8,320	17,377	11,347
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization of property and equipment and capitalized content costs, operating lease assets, and other	6,523	5,563	17,633	15,619	23,803	19,881
Stock-based compensation	2,288	1,779	6,646	5,024	8,486	6,441
Other operating expense (income), net	67	47	416	114	466	186
Other expense (income), net	(1,051)	388	(1,255)	246	(1,749)	443
Deferred income taxes	295	92	1,082	612	1,267	784
Changes in operating assets and liabilities:
Inventories	(3,899)	(381)	(3,178)	(1,762)	(4,694)	(3,112)
Accounts receivable, net and other	(2,016)	(1,181)	(3,608)	(3,776)	(7,515)	(5,172)
Accounts payable	3,658	226	4,231	(2,490)	14,914	4,393
Accrued expenses and other	(310)	(722)	(1,375)	(4,277)	1,520	(1,612)
Unearned revenue	78	(53)	932	1,225	1,417	1,753
Net cash provided by (used in) operating activities	11,964	7,892	35,633	18,855	55,292	35,332
INVESTING ACTIVITIES:
Purchases of property and equipment	(11,063)	(4,697)	(25,317)	(11,549)	(30,629)	(15,282)
Proceeds from property and equipment sales and incentives	1,255	1,312	3,467	2,800	4,838	3,414
Acquisitions, net of cash acquired, and other	(1,735)	(398)	(1,945)	(1,684)	(2,722)	(2,015)
Sales and maturities of marketable securities	13,135	7,251	32,899	15,056	40,525	16,994
Purchases of marketable securities	(17,468)	(8,542)	(51,678)	(25,368)	(58,122)	(27,428)
Net cash provided by (used in) investing activities	(15,876)	(5,074)	(42,574)	(20,745)	(46,110)	(24,317)
FINANCING ACTIVITIES:
Proceeds from short-term debt, and other	1,311	415	4,361	722	5,042	1,292
Repayments of short-term debt, and other	(1,349)	(341)	(3,886)	(704)	(4,701)	(1,129)
Proceeds from long-term debt	0	287	9,994	453	10,412	589
Repayments of long-term debt	(1,198)	(14)	(1,439)	(115)	(2,490)	(124)
Principal repayments of finance leases	(2,857)	(2,307)	(8,274)	(6,848)	(11,054)	(8,754)
Principal repayments of financing obligations	(12)	0	(44)	(3)	(68)	(129)
Net cash provided by (used in) financing activities	(4,105)	(1,960)	712	(6,495)	(2,859)	(8,255)
Foreign currency effect on cash, cash equivalents, and restricted cash	377	(269)	21	(234)	325	(238)
Net increase (decrease) in cash, cash equivalents, and restricted cash	(7,640)	589	(6,208)	(8,619)	6,648	2,522
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, END OF PERIOD	$ 30,202	$ 23,554	$ 30,202	$ 23,554	$ 30,202	$ 23,554