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Supplemental Cash Flow Disclosures (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Supplemental Cash Flow [Line Items]      
Interest paid $ 177 $ 160 $ 162
Income taxes paid, net of (refunds received) 6 (23) 44
Supplemental cash flows, stock based compensation      
Net cash receipts (disbursements) from exercise of stock options and vesting of other stock awards (5) (3) (6)
UScellular Common Shares reissued for benefit plans, net of tax payments (16) (11) (9)
TDS      
Supplemental cash flows, stock based compensation      
Cash receipts upon exercise of stock options 0 0 2
Cash disbursements for payment of taxes (5) (3) (8)
Net cash receipts (disbursements) from exercise of stock options and vesting of other stock awards (5) (3) (6)
UScellular      
Supplemental cash flows, stock based compensation      
Cash receipts upon exercise of stock options 0 0 1
Cash disbursements for payment of taxes (16) (11) (10)
UScellular Common Shares reissued for benefit plans, net of tax payments $ (16) $ (11) $ (9)
Common Shares | TDS      
Supplemental cash flows, stock based compensation      
Common Shares withheld (in shares) 223,000 153,000 814,000
Aggregate value of Common Shares withheld $ 5 $ 3 $ 29
UScellular Common Shares | UScellular      
Supplemental cash flows, stock based compensation      
Common Shares withheld (in shares) 438,000 376,000 452,000
Aggregate value of Common Shares withheld $ 16 $ 11 $ 23