Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income	$ 2,292	$ 1,218
Adjustments to reconcile net income to net cash generated from operating activities:
Depreciation and amortization	538	648
Amortization of leasehold interests in land	18	19
Amortization of deferred financing costs and original issue discount	20	21
Amortization of deferred gain on and rent from mall sale transactions	(2)	(2)
Loss on modification or early retirement of debt	3	5
Loss on disposal or impairment of assets	110	6
Stock-based compensation expense	15	18
Provision for (recovery of) doubtful accounts	(9)	54
Foreign exchange (gain) loss	(36)	23
Deferred income taxes	(646)	10
Changes in operating assets and liabilities:
Accounts receivable	66	110
Other assets	(10)	23
Accounts payable	(16)	(23)
Other liabilities	161	(21)
Net cash generated from operating activities	2,504	2,109
Cash flows from investing activities:
Capital expenditures	(416)	(380)
Proceeds from disposal of property and equipment	10	1
Net cash used in investing activities	(406)	(379)
Cash flows from financing activities:
Proceeds from exercise of stock options	70	16
Repurchase of common stock	(175)	(225)
Dividends paid	(1,804)	(1,781)
Proceeds from long-term debt (Note 4)	2,093	654
Repayments of long-term debt (Note 4)	(313)	(250)
Payments of financing costs	(39)	(5)
Net cash used in financing activities	(168)	(1,591)
Effect of exchange rate on cash, cash equivalents and restricted cash	2	40
Increase in cash, cash equivalents and restricted cash	1,932	179
Cash, cash equivalents and restricted cash at beginning of period	2,430	2,138
Cash, cash equivalents and restricted cash at end of period	4,362	2,317
Supplemental disclosure of cash flow information:
Cash payments for interest, net of amounts capitalized	155	129
Cash payments for taxes, net of refunds	135	126
Change in construction payables	$ 40	$ (173)