CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities
Net income	$ 25,042	$ 23,672
Adjustments:
Depreciation and impairment of property and equipment	9,366	7,774
Amortization and impairment of intangible assets	606	594
Stock-based compensation expense	9,768	8,149
Deferred income taxes	(280)	381
Gain on debt and equity securities, net	(3,055)	(2,399)
Other	875	(119)
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	(1,079)	25
Income taxes, net	469	210
Other assets	(592)	(787)
Accounts payable	(269)	(386)
Accrued expenses and other liabilities	891	2,927
Accrued revenue share	277	201
Deferred revenue	428	(149)
Net cash provided by operating activities	42,447	40,093
Investing activities
Purchases of property and equipment	(16,802)	(17,496)
Purchases of marketable securities	(104,932)	(80,968)
Maturities and sales of marketable securities	97,751	74,783
Purchases of non-marketable investments	(1,864)	(1,499)
Maturities and sales of non-marketable investments	598	297
Acquisitions, net of cash acquired, and purchases of intangible assets	(368)	(373)
Other investing activities	125	468
Net cash used in investing activities	(25,492)	(24,788)
Financing activities
Net payments related to stock-based award activities	(4,073)	(3,566)
Repurchases of capital stock	(23,245)	(12,298)
Proceeds from issuance of debt, net of costs	11,761	317
Repayments of debt	(2,043)	(538)
Proceeds from sale of interest in consolidated entities, net	2,462	202
Net cash used in financing activities	(15,138)	(15,883)
Effect of exchange rate changes on cash and cash equivalents	(186)	(91)
Net increase (decrease) in cash and cash equivalents	1,631	(669)
Cash and cash equivalents at beginning of period	18,498	16,701
Cash and cash equivalents at end of period	$ 20,129	$ 16,032