Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	$ 10,237	$ 5,074	$ 14,557	$ 8,658	$ 5,057	$ 3,704
OPERATING ACTIVITIES:
Net income (loss)	92	(126)	35	(18)	(188)	181
Adjustments to reconcile net income (loss) 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	1,504	1,109	2,930	2,119	5,557	3,916
Stock-based compensation	563	391	969	711	1,755	1,318
Other operating expense (income), net	42	28	87	62	153	113
Losses (gains) on sales of marketable securities, net	1	(1)	2	(1)	(1)	1
Other expense (income), net	18	(8)	109	(57)	229	(1)
Deferred income taxes	(43)	(49)	(45)	(234)	(130)	(332)
Excess tax benefits from stock-based compensation	(95)	0	(117)	(121)	(1)	(199)
Changes in operating assets and liabilities:
Inventories	(27)	92	693	791	(1,291)	(1,124)
Accounts receivable, net and other	(430)	(299)	11	428	(1,456)	(936)
Accounts payable	373	(344)	(3,876)	(5,018)	2,901	1,056
Accrued expenses and other	(129)	(15)	(1,068)	(746)	387	770
Additions to unearned revenue	1,397	894	3,200	1,986	5,647	3,477
Amortization of previously unearned revenue	(1,269)	(810)	(2,432)	(1,542)	(4,582)	(2,913)
Net cash provided by (used in) operating activities	1,997	862	498	(1,640)	8,980	5,327
INVESTING ACTIVITIES:
Purchases of property and equipment, including internal-use software and website development	(1,213)	(1,290)	(2,084)	(2,370)	(4,607)	(4,288)
Acquisitions, net of cash acquired, and other	(8)	(67)	(374)	(66)	(1,287)	(127)
Sales and maturities of marketable securities	470	962	845	1,555	2,639	2,565
Purchases of marketable securities	(625)	(336)	(1,610)	(773)	(3,379)	(1,710)
Net cash provided by (used in) investing activities	(1,376)	(731)	(3,223)	(1,654)	(6,634)	(3,560)
FINANCING ACTIVITIES:
Excess tax benefits from stock-based compensation	95	0	117	121	1	199
Proceeds from long-term debt	44	286	226	351	6,236	627
Repayments of long-term debt	(215)	(178)	(531)	(247)	(797)	(334)
Principal repayments of capital lease obligations	(580)	(285)	(1,082)	(535)	(1,832)	(969)
Principal repayments of finance lease obligations	(35)	(12)	(74)	(54)	(155)	(60)
Net cash provided by (used in) financing activities	(691)	(189)	(1,344)	(364)	3,453	(537)
Foreign-currency effect on cash and cash equivalents	102	41	(219)	57	(587)	123
Net increase (decrease) in cash and cash equivalents	32	(17)	(4,288)	(3,601)	5,212	1,353
CASH AND CASH EQUIVALENTS, END OF PERIOD	10,269	5,057	10,269	5,057	10,269	5,057
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for interest on long-term debt	152	31	169	49	212	94
Cash paid for income taxes (net of refunds)	65	71	119	109	188	158
Assets Held under Capital Leases
SUPPLEMENTAL CASH FLOW INFORMATION:
Property and equipment acquired	1,384	920	2,338	1,636	4,710	2,716
Assets Held under Build-To-Suit Leases
SUPPLEMENTAL CASH FLOW INFORMATION:
Property and equipment acquired	$ 153	$ 237	$ 256	$ 363	$ 813	$ 846