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Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2024
Share-Based Payment Arrangement, Noncash Expense [Abstract]  
Stock-based compensation
The following table summarizes stock-based compensation expense recognized during 2024, 2023 and 2022:

Year Ended December 31,202420232022
(Dollars in millions)   
Stock option awards$ $— $
Restricted stock unit awards41 32 28 
Performance share unit awards28 11 
Awards under Non-Employee Director compensation plan2 
Total stock-based compensation, before income taxes71 41 42 
Income tax benefit(18)(10)(11)
Total stock-based compensation expense, net of income taxes$53 $31 $31 
Stock-based compensation, allocation by financial statement line item
The following table provides a summary of the classification of stock-based compensation expense included in the Consolidated Statement of Operations for the years ended:

December 31,202420232022
(Dollars in millions)   
Selling, general and administrative expense$63 $36 $36 
Cost of services expense8 
Total stock-based compensation expense$71 $41 $42 
Summary of nonvested restricted stock units
A summary of TDS nonvested restricted stock units and changes during 2024 is presented in the table below:
Common Restricted Stock UnitsNumberWeighted Average Grant Date Fair Value
Nonvested at December 31, 20233,635,000 $9.76 
Granted717,000 $20.12 
Vested(1,357,000)$12.87 
Forfeited(319,000)$11.50 
Nonvested at December 31, 20242,676,000 $11.75 
A summary of UScellular nonvested restricted stock units and changes during 2024 is presented in the table below:
Common Restricted Stock UnitsNumberWeighted Average Grant Date Fair Value
Nonvested at December 31, 20232,548,000 $27.26 
Granted728,000 $35.67 
Vested(782,000)$31.98 
Forfeited(56,000)$27.68 
Nonvested at December 31, 20242,438,000 $29.01 
Summary of nonvested performance share units
A summary of TDS nonvested performance share units and changes during 2024 is presented in the table below:
Common Performance Share UnitsNumberWeighted Average Grant Date Fair Value
Nonvested at December 31, 20232,201,000 $12.17 
Granted468,000 $20.26 
Vested(192,000)$23.61 
Change in units based on approved performance factors69,000 $23.76 
Forfeited(500,000)$16.80 
Accumulated dividend equivalents31,000 $11.22 
Nonvested at December 31, 20242,077,000 $12.48 
A summary of UScellular’s nonvested performance share units and changes during 2024 is presented in the table below:
Common Performance Share UnitsNumberWeighted Average Grant Date Fair Value
Nonvested at December 31, 20231,457,000 $27.37 
Granted409,000 $36.59 
Vested(263,000)$20.06 
Change in units based on approved performance factors114,000 $23.06 
Forfeited(109,000)$21.35 
Nonvested at December 31, 20241,608,000 $31.91 
Summary of stock options
A summary of TDS stock options and changes during 2024 is presented in the tables and narrative below.
Common Share Options
Number of OptionsWeighted Average Exercise Prices
Aggregate Intrinsic Value
(in millions)
Weighted Average Remaining Contractual Life
(in years)
Outstanding at December 31, 20232,517,000 $26.72 
Exercised(357,000)$25.69 
Forfeited(4,000)$25.36 
Expired(543,000)$26.88 
Outstanding at December 31, 20241,613,000 $26.90 $12 2.9
(1,613,000 exercisable)$26.90 $12 2.9