Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	$ 8,084	$ 5,269	$ 3,777
OPERATING ACTIVITIES:
Net income (loss)	274	(39)	631
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	3,253	2,159	1,083
Stock-based compensation	1,134	833	557
Other operating expense (income), net	114	154	154
Losses (gains) on sales of marketable securities, net	1	(9)	(4)
Other expense (income), net	166	253	(56)
Deferred income taxes	(156)	(265)	136
Excess tax benefits from stock-based compensation	(78)	(429)	(62)
Changes in operating assets and liabilities:
Inventories	(1,410)	(999)	(1,777)
Accounts receivable, net and other	(846)	(861)	(866)
Accounts payable	1,888	2,070	2,997
Accrued expenses and other	736	1,038	1,067
Additions to unearned revenue	2,691	1,796	1,064
Amortization of previously unearned revenue	(2,292)	(1,521)	(1,021)
Net cash provided by (used in) operating activities	5,475	4,180	3,903
INVESTING ACTIVITIES:
Purchases of property and equipment, including internal-use software and website development	(3,444)	(3,785)	(1,811)
Acquisitions, net of cash acquired, and other	(312)	(745)	(705)
Sales and maturities of marketable securities and other investments	2,306	4,237	6,843
Purchases of marketable securities and other investments	(2,826)	(3,302)	(6,257)
Net cash provided by (used in) investing activities	(4,276)	(3,595)	(1,930)
FINANCING ACTIVITIES:
Excess tax benefits from stock-based compensation	78	429	62
Common stock repurchased	0	(960)	(277)
Proceeds from long-term debt and other	394	3,378	177
Repayments of long-term debt, capital lease, and finance lease obligations	(1,011)	(588)	(444)
Net cash provided by (used in) financing activities	(539)	2,259	(482)
Foreign-currency effect on cash and cash equivalents	(86)	(29)	1
Net increase (decrease) in cash and cash equivalents	574	2,815	1,492
CASH AND CASH EQUIVALENTS, END OF PERIOD	8,658	8,084	5,269
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for interest on long-term debt	97	31	14
Cash paid for income taxes (net of refunds)	169	112	33
Assets Held under Capital Leases
SUPPLEMENTAL CASH FLOW INFORMATION:
Property and equipment acquired	1,867	802	753
Assets Held under Build-To-Suit Leases
SUPPLEMENTAL CASH FLOW INFORMATION:
Property and equipment acquired	$ 877	$ 29	$ 259