Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities
Net income	$ 58	$ 55
Add (deduct) adjustments to reconcile net income to net cash flows from operating activities
Depreciation, amortization and accretion	169	159
Bad debts expense	24	19
Stock-based compensation expense	9	8
Deferred income taxes, net	17	15
Equity in earnings of unconsolidated entities	(44)	(38)
Distributions from unconsolidated entities	18	17
(Gain) loss on asset disposals, net	2	1
(Gain) loss on sale of business and other exit costs, net	(2)	0
(Gain) loss on license sales and exchanges, net	(2)	(7)
Noncash interest	1	1
Changes in assets and liabilities from operations
Accounts receivable	31	69
Equipment installment plans receivable	(10)	(17)
Inventory	(15)	(2)
Accounts payable	56	(30)
Customer deposits and deferred revenues	7	(26)
Accrued taxes	11	5
Accrued interest	9	9
Other assets and liabilities	(52)	(50)
Net cash provided by operating activities	287	188
Cash flows from investing activities
Cash paid for additions to property, plant and equipment	(107)	(76)
Cash paid for licenses	(1)	(1)
Cash received from investments	2	50
Cash paid for investments	(1)	0
Cash received from divestitures and exchanges	31	4
Advance payments for license acquisitions	135	0
Other investing activities	(1)	0
Net cash used in investing activities	(212)	(23)
Cash flows from financing activities
Repayment of long-term debt	(5)	(5)
Common shares reissued for benefit plans, net of tax payments	0	2
Distributions to noncontrolling interests	(1)	0
Other financing activities	0	(4)
Net cash used in financing activities	(6)	(7)
Net increase in cash, cash equivalents and restricted cash	69	158
Cash, cash equivalents and restricted cash
Beginning of period	583	352
End of period	$ 652	$ 510