CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating activities
Net income	$ 6,836	$ 6,657
Adjustments:
Depreciation and impairment of property and equipment	2,899	2,416
Amortization and impairment of intangible assets	209	197
Stock-based compensation expense	3,191	2,769
Deferred income taxes	175	(73)
(Gain) loss on debt and equity securities, net	802	(1,081)
Other	297	22
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	2,602	1,172
Income taxes, net	(245)	1,068
Other assets	(115)	(265)
Accounts payable	(835)	(425)
Accrued expenses and other liabilities	(3,531)	(229)
Accrued revenue share	(871)	(147)
Deferred revenue	37	(81)
Net cash provided by operating activities	11,451	12,000
Investing activities
Purchases of property and equipment	(6,005)	(4,638)
Purchases of marketable securities	(37,563)	(20,883)
Maturities and sales of marketable securities	41,811	21,006
Purchases of non-marketable investments	(572)	(907)
Maturities and sales of non-marketable investments	260	99
Acquisitions, net of cash acquired, and purchases of intangible assets	(190)	(99)
Other investing activities	412	34
Net cash used in investing activities	(1,847)	(5,388)
Financing activities
Net payments related to stock-based award activities	(1,241)	(1,175)
Repurchases of capital stock	(8,496)	(3,025)
Proceeds from issuance of debt, net of costs	1,898	315
Repayments of debt	(1,947)	(345)
Proceeds from sale of interest in consolidated entities	1,600	47
Net cash used in financing activities	(8,186)	(4,183)
Effect of exchange rate changes on cash and cash equivalents	(272)	18
Net increase in cash and cash equivalents	1,146	2,447
Cash and cash equivalents at beginning of period	18,498	16,701
Cash and cash equivalents at end of period	$ 19,644	$ 19,148