CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 664	$ 310	$ 4,822	$ 1,230
(Income) loss from discontinued operations, net of income taxes	(43)	(100)	(3,061)	(183)
Adjustments:
Provision for transaction losses	60	68	245	194
Depreciation and amortization			471	474
Stock-based compensation			311	321
(Gain) loss on sale of business			0	52
(Gain) loss on investments, net			1	1
Deferred income taxes			169	(22)
Change in fair value of warrant			(496)	(56)
Changes in assets and liabilities, net of acquisition effects			(199)	(122)
Net cash provided by continuing operating activities			2,263	1,889
Net cash provided by (used in) discontinued operating activities	(611)	208	(602)	414
Net cash provided by operating activities			1,661	2,303
Cash flows from investing activities:
Purchases of property and equipment			(326)	(394)
Purchases of investments			(28,897)	(37,390)
Maturities and sales of investments			28,740	40,483
Equity investment in Paytm Mall			0	(160)
Other			39	15
Net cash provided by (used in) continuing investing activities			(444)	2,554
Net cash provided by (used in) discontinued investing activities	(7)	(4)	4,024	(125)
Net cash provided by investing activities			3,580	2,429
Cash flows from financing activities:
Proceeds from issuance of common stock			55	59
Repurchases of common stock			(4,710)	(3,971)
Payments for taxes related to net share settlements of restricted stock units and awards			(131)	(162)
Payments for dividends	(111)	(115)	(337)	(360)
Proceeds from issuance of long-term debt, net			1,765	0
Repayment of debt			(1,771)	(1,550)
Other			(12)	1
Net cash used in continuing financing activities			(5,141)	(5,983)
Net cash provided by (used in) discontinued financing activities	0	0	(2)	0
Net cash used in financing activities			(5,143)	(5,983)
Effect of exchange rate changes on cash, cash equivalents and restricted cash			25	(59)
Net increase (decrease) in cash, cash equivalents and restricted cash			123	(1,310)
Cash, cash equivalents and restricted cash at beginning of period			996	2,219	$ 2,219
Cash, cash equivalents and restricted cash at end of period	1,119	909	1,119	909	996
Cash, cash equivalents and restricted cash of continuing operations at end of period	1,089	845	1,089	845	$ 922
Supplemental cash flow disclosures:
Cash paid for interest			243	260
Cash paid for interest on financial lease obligations			1	1
Cash paid for income taxes			376	188
Discontinued Operations, Held-for-sale
Cash flows from financing activities:
Less: Cash, cash equivalents and restricted cash of discontinued operations	30	41	30	41
Discontinued Operations, Disposed of by Sale
Cash flows from financing activities:
Less: Cash, cash equivalents and restricted cash of discontinued operations	$ 0	$ 23	$ 0	$ 23