CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating activities
Net income	$ 36,455	$ 13,795
Adjustments:
Depreciation and impairment of property and equipment	5,255	6,077
Amortization and impairment of intangible assets	443	417
Stock-based compensation expense	7,548	6,573
Deferred income taxes	1,479	(416)
Gain on debt and equity securities, net	(7,634)	(1,040)
Other	(263)	669
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	(867)	2,522
Income taxes, net	(297)	538
Other assets	(192)	(359)
Accounts payable	(1,112)	(689)
Accrued expenses and other liabilities	201	(2,099)
Accrued revenue share	29	(692)
Deferred revenue	134	148
Net cash provided by operating activities	41,179	25,444
Investing activities
Purchases of property and equipment	(11,438)	(11,396)
Purchases of marketable securities	(60,609)	(64,111)
Maturities and sales of marketable securities	60,667	65,874
Purchases of non-marketable investments	(1,412)	(1,311)
Maturities and sales of non-marketable investments	256	473
Acquisitions, net of cash acquired, and purchases of intangible assets	(1,974)	(355)
Other investing activities	53	531
Net cash used in investing activities	(14,457)	(10,295)
Financing activities
Net payments related to stock-based award activities	(4,637)	(2,716)
Repurchases of capital stock	(24,191)	(15,348)
Proceeds from issuance of debt, net of costs	7,599	1,898
Repayments of debt	(8,678)	(1,982)
Proceeds from sale of interest in consolidated entities, net	310	2,464
Net cash used in financing activities	(29,597)	(15,684)
Effect of exchange rate changes on cash and cash equivalents	40	(221)
Net decrease in cash and cash equivalents	(2,835)	(756)
Cash and cash equivalents at beginning of period	26,465	18,498
Cash and cash equivalents at end of period	$ 23,630	$ 17,742