Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Cash Flows [Abstract]
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	$ 15,440	$ 12,470	$ 19,334	$ 15,890	$ 12,521	$ 10,269
OPERATING ACTIVITIES:
Net income	197	857	921	1,370	1,922	1,931
Adjustments to reconcile net income to net cash from operating activities:
Depreciation of property and equipment, including internal-use software and website development, and other amortization, including capitalized content costs	2,633	1,909	5,068	3,736	9,448	7,087
Stock-based compensation	1,158	768	1,952	1,312	3,615	2,461
Other operating expense, net	60	53	102	97	164	166
Other expense (income), net	(120)	32	(160)	(18)	(162)	121
Deferred income taxes	376	106	354	117	(8)	243
Changes in operating assets and liabilities:
Inventories	(682)	(57)	265	712	(1,874)	(2,167)
Accounts receivable, net and other	(1,242)	(1,184)	(248)	(772)	(2,842)	(2,538)
Accounts payable	2,088	977	(4,777)	(4,793)	5,046	3,377
Accrued expenses and other	(252)	(15)	(1,657)	(972)	1,039	1,007
Additions to unearned revenue	3,047	2,340	7,100	5,154	13,877	9,355
Amortization of previously unearned revenue	(3,434)	(2,208)	(6,681)	(4,318)	(12,340)	(7,994)
Net cash provided by (used in) operating activities	3,829	3,578	2,239	1,625	17,885	13,049
INVESTING ACTIVITIES:
Purchases of property and equipment, including internal-use software and website development, net	(2,501)	(1,711)	(4,362)	(2,890)	(8,207)	(5,395)
Acquisitions, net of cash acquired, and other	(633)	(14)	(678)	(30)	(765)	(452)
Sales and maturities of marketable securities	2,293	931	4,202	2,069	6,866	4,249
Purchases of marketable securities	(4,210)	(1,645)	(5,829)	(2,281)	(11,304)	(4,762)
Net cash provided by (used in) investing activities	(5,051)	(2,439)	(6,667)	(3,132)	(13,410)	(6,360)
FINANCING ACTIVITIES:
Proceeds from long-term debt and other	66	66	90	75	636	202
Repayments of long-term debt and other	(54)	(70)	(122)	(245)	(232)	(1,366)
Principal repayments of capital lease obligations	(1,228)	(1,116)	(2,060)	(1,917)	(4,003)	(3,298)
Principal repayments of finance lease obligations	(47)	(32)	(85)	(61)	(170)	(108)
Net cash provided by (used in) financing activities	(1,263)	(1,152)	(2,177)	(2,148)	(3,769)	(4,570)
Foreign currency effect on cash and cash equivalents	248	64	474	286	(24)	133
Net increase (decrease) in cash and cash equivalents	(2,237)	51	(6,131)	(3,369)	682	2,252
CASH AND CASH EQUIVALENTS, END OF PERIOD	13,203	12,521	13,203	12,521	13,203	12,521
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for interest on long-term debt	146	143	150	145	295	301
Cash paid for interest on capital and finance lease obligations	62	48	123	95	234	180
Cash paid for income taxes, net of refunds	447	88	693	226	879	380
Property and equipment acquired under capital leases	2,724	1,422	4,612	2,297	8,019	4,676
Property and equipment acquired under build-to-suit leases	$ 748	$ 231	$ 1,948	$ 582	$ 2,575	$ 870