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Consolidated Statement of Cash Flows - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Cash flows from operating activities    
Net income $ 97 $ 141
Add (deduct) adjustments to reconcile net income to net cash flows from operating activities    
Depreciation, amortization and accretion 350 354
Bad debts expense 21 45
Stock-based compensation expense 12 17
Deferred income taxes, net 35 106
Equity in earnings of unconsolidated entities (88) (89)
Distributions from unconsolidated entities 79 90
(Gain) loss on asset disposals, net 7 8
(Gain) loss on sale of business and other exit costs, net (1) 0
Other operating activities 19 0
Changes in assets and liabilities from operations    
Accounts receivable 23 23
Equipment installment plans receivable (32) 22
Inventory (37) 17
Accounts payable (72) 55
Customer deposits and deferred revenues 2 (10)
Accrued taxes (23) (67)
Other assets and liabilities (29) (20)
Net cash provided by operating activities 363 692
Cash flows from investing activities    
Cash paid for additions to property, plant and equipment (281) (471)
Cash paid for licenses (1,259) (144)
Cash received from investments 3 1
Cash paid for investments 0 (1)
Cash received from divestitures and exchanges 1 1
Advance payments for license acquisitions 0 (16)
Other investing activities 2 (1)
Net cash used in investing activities (1,534) (631)
Cash flows from financing activities    
Issuance of long-term debt 992 125
Repayment of long-term debt (775) (4)
Common Shares reissued for benefit plans, net of tax payments (13) (8)
Repurchase of Common Shares (2) (23)
Payment of debt issuance costs (16) (4)
Distributions to noncontrolling interests (2) (1)
Other financing activities (7) (1)
Net cash provided by financing activities 177 84
Net increase (decrease) in cash, cash equivalents and restricted cash (994) 145
Cash, cash equivalents and restricted cash    
Beginning of period 1,291 291
End of period $ 297 $ 436