Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Net income	$ 58	$ 35	$ 160
Add (deduct) adjustments to reconcile net income to net cash flows from operating activities
Depreciation, amortization and accretion	656	700	678
Bad debts expense	104	132	56
Stock-based compensation expense	23	24	27
Deferred income taxes, net	47	33	41
Equity in earnings of unconsolidated entities	(158)	(158)	(179)
Distributions from unconsolidated entities	150	145	176
Loss on impairment of licenses	0	3	0
(Gain) loss on asset disposals, net	17	19	23
(Gain) loss on sale of business and other exit costs, net	0	(1)	(2)
(Gain) loss on license sales and exchanges, net	(2)	0	0
Other operating activities	6	9	33
Changes in assets and liabilities from operations
Accounts receivable	17	(59)	(27)
Equipment installment plans receivable	(20)	(199)	(116)
Inventory	62	(88)	(27)
Accounts payable	(85)	12	(57)
Customer deposits and deferred revenues	(9)	47	40
Accrued taxes	0	121	(41)
Other assets and liabilities	0	57	17
Net cash provided by operating activities	866	832	802
Cash flows from investing activities
Cash paid for additions to property, plant and equipment	(608)	(602)	(724)
Cash paid for licenses	(130)	(585)	(1,302)
Advance payments for license acquisitions	0	0	(20)
Other investing activities	17	8	10
Net cash used in investing activities	(721)	(1,179)	(2,036)
Cash flows from financing activities
Issuance of long-term debt	315	800	1,342
Repayment of long-term debt	(453)	(329)	(1,118)
Issuance of short-term debt	0	110	0
Repayment of short-term debt	(60)	(50)	0
Common Shares reissued for benefit plans, net of tax payments	(6)	(5)	(16)
Repurchase of Common Shares	0	(43)	(31)
Payment of debt issuance costs	(1)	(1)	(22)
Distributions to noncontrolling interests	(3)	(3)	(3)
Cash paid for software license agreements	(66)	(22)	(9)
Other financing activities	0	(1)	(1)
Net cash provided by (used in) financing activities	(274)	456	142
Net increase (decrease) in cash, cash equivalents and restricted cash	(129)	109	(1,092)
Cash, cash equivalents and restricted cash
Beginning of period	308	199	1,291
End of period	$ 179	$ 308	$ 199