Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities
Net income	$ 9	$ 165
Add (deduct) adjustments to reconcile net income to cash flows from operating activities
Depreciation, amortization and accretion	153	147
Bad debts expense	19	29
Stock-based compensation expense	5	6
Deferred income taxes, net	4	(26)
Equity in earnings of unconsolidated entities	(35)	(34)
Distributions from unconsolidated entities	14	13
(Gain) loss on asset disposals, net	5	4
(Gain) loss on sale of business and other exit costs, net		(111)
(Gain) loss on license sales and exchanges, net		(123)
Changes in assets and liabilities from operations
Accounts receivable	15	(1)
Equipment installment plans receivable	(41)	(36)
Inventory	(2)	102
Accounts payable	43	(19)
Customer deposits and deferred revenues	(6)	13
Accrued taxes	30	189
Accrued interest	9	10
Other assets and liabilities	(59)	(73)
Net cash provided by operating activities	163	255
Cash flows from investing activities
Cash paid for additions to property, plant and equipment	(103)	(116)
Cash paid for aquisitions and licenses		(280)
Cash received from divestitures and exchanges	2	274
Other investing activities	(1)	2
Net cash used in investing activities	(102)	(120)
Cash flows from financing activities
Repayment of long-term debt	(3)
Common shares reissued for benefit plans, net of tax payments	1
Common shares repurchased	(2)	(2)
Payment of debt issuance costs		(3)
Acquisition of assets in common control transaction		(2)
Other financing activities		(3)
Net cash used in financing activities	(4)	(10)
Net increase in cash and cash equivalents	57	125
Cash and cash equivalents
Beginning of period	715	212
End of period	$ 772	$ 337