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Stock-Based Compensation - TDS, Overview (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Stock based compensation
Stock-based compensation expense	$ 41	$ 42	$ 49
Income tax benefit	(10)	(11)	(12)
Total stock-based compensation expense, net of income taxes	31	31	37
Unrecognized compensation cost for all stock-based compensation awards	$ 69
Weighted average period for recognition of unrecognized compensation cost for all stock-based compensation awards	1 year 9 months 18 days
Tax benefit from exercise of stock options and other awards	$ 7
Selling, general and administrative expense
Stock based compensation
Stock-based compensation expense	36	36	44
Cost of services expense
Stock based compensation
Stock-based compensation expense	5	6	5
Long-Term Incentive Plans | Stock Options
Stock based compensation
Stock-based compensation expense	0	1	2
Long-Term Incentive Plans | Restricted Stock Units
Stock based compensation
Stock-based compensation expense	32	28	29
Long-Term Incentive Plans | Performance Share Units
Stock based compensation
Stock-based compensation expense	7	11	16
Non-Employee Directors' Plan
Stock based compensation
Stock-based compensation expense	$ 2	$ 2	$ 2
Non-Employee Directors' Plan | TDS | Common Shares
Stock based compensation
Shares reserved	500,000
Shares issued	81,000	51,000	50,000
TDS Long-Term Incentive Plans | TDS | Common Shares
Stock based compensation
Shares reserved	19,750,000
Dividend Reinvestment Plan | TDS | Series A Common Shares
Stock based compensation
Shares reserved	92,000
Purchase price, percent	95.00%
Dividend Reinvestment Plan | TDS | Common Shares
Stock based compensation
Shares reserved	2,111,000
Purchase price, percent	95.00%

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