CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating activities:
Net loss	$ (100)	$ (149)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation of property and equipment, including internal-use software and website development	176	167
Amortization of stock-based compensation	56	50
Amortization of intangible assets	52	72
Deferred income taxes	17	88
Foreign exchange (gain) loss on cash, restricted cash and short-term investments, net	5	(5)
Realized gain on foreign currency forwards	(7)	(8)
Gain on minority equity investments, net	(22)	(37)
Other	(7)	(3)
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	(468)	(345)
Prepaid expenses and other assets	(23)	(57)
Accounts payable, merchant	39	(127)
Accounts payable, other, accrued expenses and other liabilities	146	38
Tax payable/receivable, net	(169)	(178)
Deferred merchant bookings	2,285	2,027
Deferred revenue	169	143
Net cash provided by operating activities	2,149	1,676
Investing activities:
Capital expenditures, including internal-use software and website development	(274)	(192)
Purchases of investments	(438)	(867)
Sales and maturities of investments	0	317
Other, net	6	14
Net cash used in investing activities	(706)	(728)
Financing activities:
Purchases of treasury stock	(25)	(202)
Payment of dividends to stockholders	(47)	(46)
Proceeds from exercise of equity awards and employee stock purchase plan	91	20
Other, net	2	(8)
Net cash provided by (used in) financing activities	21	(236)
Effect of exchange rate changes on cash, cash equivalents and restricted cash and cash equivalents	(11)	17
Net increase in cash, cash equivalents and restricted cash and cash equivalents	1,453	729
Cash, cash equivalents and restricted cash and cash equivalents at beginning of period	2,705	2,917
Cash, cash equivalents and restricted cash and cash equivalents at end of period	4,158	3,646
Supplemental cash flow information
Cash paid for interest	71	86
Income tax payments, net	$ 105	$ 67