Consolidated Statement of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities
Net income (loss)	$ 143	$ (259)
Add (deduct) adjustments to reconcile net income (loss) to net cash flows from operating activities
Depreciation, amortization and accretion	478	460
Bad debts expense	67	64
Stock-based compensation expense	26	21
Deferred income taxes, net	(4)	(73)
Equity in earnings of unconsolidated entities	(120)	(101)
Distributions from unconsolidated entities	90	85
Loss on impairment of goodwill	0	370
(Gain) loss on asset disposals, net	5	14
(Gain) loss on sale of business and other exit costs, net	0	(1)
(Gain) loss on license sales and exchanges, net	(18)	(19)
Noncash interest	2	1
Changes in assets and liabilities from operations
Accounts receivable	(1)	(16)
Equipment installment plans receivable	(88)	(164)
Inventory	15	36
Accounts payable	21	(58)
Customer deposits and deferred revenues	(5)	(13)
Accrued taxes	1	31
Accrued interest	9	9
Other assets and liabilities	(21)	7
Net cash provided by operating activities	600	394
Cash flows from investing activities
Cash paid for additions to property, plant and equipment	(277)	(252)
Cash paid for licenses	(2)	(189)
Cash received for investments	50	0
Cash paid for investments	0	(50)
Cash received from divestitures and exchanges	23	19
Other investing activities	3	0
Net cash used in investing activities	(203)	(472)
Cash flows from financing activities
Repayment of long-term debt	(14)	(9)
Common shares reissued for benefit plans, net of tax payments	7	1
Payment of debt issuance costs	(1)	0
Distributions to noncontrolling interests	(5)	(2)
Other financing activities	(4)	0
Net cash used in financing activities	(17)	(10)
Net increase (decrease) in cash, cash equivalents and restricted cash	380	(88)
Cash, cash equivalents and restricted cash
Beginning of period	352	586
End of period	$ 732	$ 498