Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities
Net income	$ 62	$ 72
Add (deduct) adjustments to reconcile net income to net cash flows from operating activities
Depreciation, amortization and accretion	170	177
Bad debts expense	7	33
Stock-based compensation expense	6	7
Deferred income taxes, net	23	52
Equity in earnings of unconsolidated entities	(42)	(45)
Distributions from unconsolidated entities	22	24
(Gain) loss on asset disposals, net	5	4
(Gain) loss on sale of business and other exit costs, net	(1)	0
Other operating activities	(1)	0
Changes in assets and liabilities from operations
Accounts receivable	4	55
Equipment installment plans receivable	(18)	23
Inventory	7	(50)
Accounts payable	(86)	97
Customer deposits and deferred revenues	7	(10)
Accrued taxes	3	(49)
Accrued interest	9	9
Other assets and liabilities	(53)	(57)
Net cash provided by operating activities	124	342
Cash flows from investing activities
Cash paid for additions to property, plant and equipment	(133)	(315)
Cash paid for licenses	(1,256)	(26)
Cash paid for investments	0	(1)
Cash received from divestitures and exchanges	1	0
Net cash used in investing activities	(1,388)	(342)
Cash flows from financing activities
Issuance of long-term debt	492	0
Repayment of long-term debt	0	(2)
Common Shares reissued for benefit plans, net of tax payments	(1)	0
Repurchase of Common Shares	(2)	(21)
Payment of debt issuance costs	(1)	(1)
Distributions to noncontrolling interests	(1)	(1)
Other financing activities	(2)	1
Net cash provided by (used in) financing activities	485	(24)
Net decrease in cash, cash equivalents and restricted cash	(779)	(24)
Cash, cash equivalents and restricted cash
Beginning of period	1,291	291
End of period	$ 512	$ 267