Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating activities:
Net income (loss)	$ (169)	$ 60
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	64	61
Stock-based compensation expense (Note 5)	51	60
Deferred income tax expense	6	17
Provision for expected credit losses and other, net	24	6
Changes in operating assets and liabilities, net of effects from acquisitions and other investments:
Accounts receivable and contract assets, prepaid expenses and other assets	95	(61)
Accounts payable, accrued expenses and other liabilities	(46)	(1)
Deferred merchant payables	(100)	183
Income tax receivables/payables, net	(50)	3
Deferred revenue	(23)	35
Net cash provided by (used in) operating activities	(148)	363
Investing activities:
Capital expenditures, including internal-use software and website development	(36)	(38)
Purchases of marketable securities		(69)
Maturities of marketable securities		20
Other investing activities, net	2
Net cash used in investing activities	(34)	(87)
Financing activities:
Repurchase of common stock (Note 12)	(115)
Proceeds from exercise of stock options		1
Payment of withholding taxes on net share settlements of equity awards	(17)	(26)
Payments of finance lease obligation	(3)	(3)
Net cash provided by (used in) financing activities	561	(28)
Effect of exchange rate changes on cash, cash equivalents and restricted cash		(2)
Net increase in cash, cash equivalents and restricted cash	379	246
Cash, cash equivalents and restricted cash at beginning of period	319	655
Cash, cash equivalents and restricted cash at end of period	698	$ 901
2015 Credit Facility
Financing activities:
Proceeds from credit facility	700
Payment of financing costs from 2015 credit facility (Note 8)	$ (4)