Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities
Net income	$ 55	$ 28
Add (deduct) adjustments to reconcile net income to net cash flows from operating activities
Depreciation, amortization and accretion	159	153
Bad debts expense	19	24
Stock-based compensation expense	8	7
Deferred income taxes, net	15	1
Equity in earnings of unconsolidated entities	(38)	(33)
Distributions from unconsolidated entities	17	11
(Gain) loss on asset disposals, net	1	4
(Gain) loss on license sales and exchanges, net	(7)	(17)
Noncash interest	1
Changes in assets and liabilities from operations
Accounts receivable	69	26
Equipment installment plans receivable	(17)	(44)
Inventory	(2)	(3)
Accounts payable	(30)	(78)
Customer deposits and deferred revenues	(26)	(10)
Accrued taxes	5	22
Accrued interest	9	9
Other assets and liabilities	(50)	(39)
Net cash provided by operating activities	188	61
Cash flows from investing activities
Cash paid for additions to property, plant and equipment	(76)	(88)
Cash paid for licenses	(1)	(3)
Cash received for investments	50	0
Cash received from divestitures and exchanges	4	16
Net cash used in investing activities	(23)	(75)
Cash flows from financing activities
Repayment of long-term debt	(5)	(3)
Common shares reissued for benefit plans, net of tax payments	2	3
Other financing activities	(4)	0
Net cash used in financing activities	(7)
Net increase (decrease) in cash, cash equivalents and restricted cash	158	(14)
Cash, cash equivalents and restricted cash
Beginning of period	352	586
End of period	$ 510	$ 572