CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating activities:
Net income	$ 572	$ 398	$ 372
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property and equipment, including internal-use software and website development	712	676	614
Amortization of stock-based compensation	241	203	149
Amortization and impairment of intangible assets	198	325	275
Impairment of goodwill	0	86	0
Deferred income taxes	(91)	(308)	(103)
Foreign exchange (gain) loss on cash, restricted cash and short-term investments, net	(5)	111	(79)
Realized (gain) loss on foreign currency forwards	(22)	(31)	(6)
(Gain) loss on minority equity investments, net	(8)	111	14
Other	(21)	22	(30)
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	(368)	(282)	(456)
Prepaid expenses and other assets	(193)	(29)	(71)
Accounts payable, merchant	224	(134)	316
Accounts payable, other, accrued expenses and other liabilities	254	196	257
Tax payable/receivable, net	(23)	102	(30)
Deferred merchant bookings	1,342	489	593
Deferred revenue	(45)	40	30
Net cash provided by operating activities	2,767	1,975	1,845
Investing activities:
Capital expenditures, including internal-use software and website development	(1,160)	(878)	(710)
Purchases of investments	(1,346)	(1,803)	(1,811)
Sales and maturities of investments	852	2,137	1,096
Acquisitions, net of cash and restricted cash acquired	80	(53)	(169)
Other, net	21	38	13
Net cash used in investing activities	(1,553)	(559)	(1,581)
Financing activities:
Proceeds from issuance of long-term debt, net of issuance costs	1,231	0	990
Payment of long-term debt	0	(500)	0
Payment of Liberty Expedia Exchangeable Debentures	(400)	0	0
Purchases of treasury stock	(743)	(923)	(312)
Proceeds from issuance of treasury stock	0	31	0
Payment of dividends to stockholders	(195)	(186)	(176)
Proceeds from exercise of equity awards and employee stock purchase plan	301	166	229
Changes in controlled subsidiaries, net	(28)	(62)	(18)
Other, net	9	(15)	(25)
Net cash provided by (used in) financing activities	175	(1,489)	688
Effect of exchange rate changes on cash, cash equivalents and restricted cash and cash equivalents	3	(139)	147
Net increase (decrease) in cash, cash equivalents and restricted cash and cash equivalents	1,392	(212)	1,099
Cash, cash equivalents and restricted cash and cash equivalents at beginning of year	2,705	2,917	1,818
Cash, cash equivalents and restricted cash and cash equivalents at end of year	4,097	2,705	2,917
Supplemental cash flow information
Cash paid for interest	157	196	163
Income tax payments, net	$ 304	$ 282	$ 174