Consolidated Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities
Net income	$ 107	$ 40
Add (deduct) adjustments to reconcile net income to net cash flows from operating activities
Depreciation, amortization and accretion	317	307
Bad debts expense	40	47
Stock-based compensation expense	17	14
Deferred income taxes, net	9	(27)
Equity in earnings of unconsolidated entities	(78)	(66)
Distributions from unconsolidated entities	70	65
(Gain) loss on asset disposals, net	2	9
(Gain) loss on license sales and exchanges, net	(17)	(19)
Noncash interest	2	1
Changes in assets and liabilities from operations
Accounts receivable	43	(5)
Equipment installment plans receivable	(47)	(107)
Inventory	(3)	(2)
Accounts payable	(35)	(53)
Customer deposits and deferred revenues	(23)	(6)
Accrued taxes	6	45
Other assets and liabilities	(45)	(23)
Net cash provided by operating activities	365	220
Cash flows from investing activities
Cash paid for additions to property, plant and equipment	(173)	(155)
Cash paid for licenses	(2)	(189)
Cash received for investments	50	0
Cash received from divestitures and exchanges	21	17
Other investing activities	3
Net cash used in investing activities	(101)	(327)
Cash flows from financing activities
Repayment of long-term debt	(10)	(6)
Payment of debt issuance costs	(1)	0
Distributions to noncontrolling interests	(4)	(2)
Other financing activities	(4)	1
Net cash used in financing activities	(19)	(7)
Net increase (decrease) in cash, cash equivalents and restricted cash	245	(114)
Cash, cash equivalents and restricted cash
Beginning of period	352	586
End of period	$ 597	$ 472