CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities
Net income	$ 1,510	$ 512
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	552	457
Share-based compensation	747	694
Deferred income taxes	(65)	(223)
Tax benefit from share-based award activity	494	423
Excess tax benefit from share-based award activity	(494)	(423)
Other	13	6
Changes in assets and liabilities:
Accounts receivable	267	84
Prepaid expenses and other current assets	(106)	(43)
Other assets	15	(32)
Accounts payable	2	(15)
Partners payable	(3)	(13)
Accrued expenses and other current liabilities	(16)	134
Deferred revenue and deposits	(2)	(10)
Other liabilities	69	149
Net cash provided by operating activities	2,983	1,700
Cash flows from investing activities
Purchases of property and equipment	(1,132)	(502)
Purchases of marketable securities	(3,126)	(3,055)
Sales of marketable securities	2,013	608
Maturities of marketable securities	537	339
Acquisitions of businesses, net of cash acquired, and purchases of intangible assets	(1)	(257)
Change in restricted cash and deposits	33	23
Net cash used in investing activities	(1,676)	(2,844)
Cash flows from financing activities
Principal payments on capital lease and other financing obligations	(312)	(47)
Excess tax benefit from share-based award activity	494	423
Other financing activities, net	2	(5)
Net cash provided by financing activities	184	371
Effect of exchange rate changes on cash and cash equivalents	58	(123)
Net increase (decrease) in cash and cash equivalents	1,549	(896)
Cash and cash equivalents at beginning of period	4,907	4,315
Cash and cash equivalents at end of period	6,456	3,419
Cash paid during the period for:
Interest	11	3
Income taxes, net	170	119
Non-cash investing and financing activities:
Net change in accounts payable, accrued expenses and other current liabilities, and other liabilities related to property and equipment additions	52	186
Promissory note payable issued in connection with an acquisition	$ 0	$ 198