CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
OPERATING ACTIVITIES
Net income	$ 180	$ 432
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,829	1,963
Deferred income taxes	(126)	21
Loss on the sale of data centers and colocation business	119	0
Impairment of assets held for sale	11	1
Provision for uncollectible accounts	78	96
Net loss on early retirement of debt	5	0
Share-based compensation	43	40
Changes in current assets and liabilities:
Accounts receivable	71	(125)
Accounts payable	(112)	74
Accrued income and other taxes	29	208
Other current assets and liabilities, net	(306)	(64)
Retirement benefits	(56)	(28)
Changes in other noncurrent assets and liabilities, net	(92)	(35)
Other, net	69	18
Net cash provided by operating activities	1,742	2,601
INVESTING ACTIVITIES
Payments for property, plant and equipment and capitalized software	(1,610)	(1,264)
Cash paid for acquisitions	(5)	(24)
Proceeds from the sale of data centers and colocation business, less cash sold	1,473	0
Proceeds from sale of property	48	11
Other, net	0	(2)
Net cash used in investing activities	(94)	(1,279)
FINANCING ACTIVITIES
Net proceeds from issuance of long-term debt	6,608	1,215
Proceeds from financing obligation (Note 3)	378	0
Payments of long-term debt	(1,530)	(1,464)
Net payments on Credit Facility and revolving line of credit	(370)	(410)
Dividends paid	(590)	(586)
Proceeds from issuance of common stock	4	3
Shares withheld to satisfy tax withholdings	(15)	(15)
Net cash provided by (used in) financing activities	4,485	(1,257)
Net increase in cash, cash equivalents and restricted cash	6,133	65
Cash, cash equivalents and restricted cash at beginning of period	224	128
Cash, cash equivalents and restricted cash at end of period	6,357	193
Supplemental cash flow information:
Income taxes refunded (paid), net	(260)	(21)
Interest paid (net of capitalized interest of $41 and $24)	$ (624)	$ (660)