Consolidated Statement of Changes in Equity - USD ($) $ in Millions	Total	Series A Common and Common shares	Capital in excess of par value	Preferred Shares	Treasury shares	Accumulated other comprehensive income (loss)	Retained earnings	Total TDS shareholders' equity	Noncontrolling interests
Beginning balance at Dec. 31, 2022	$ 6,603	$ 1	$ 2,551	$ 1,074	$ (481)	$ 5	$ 2,699	$ 5,849	$ 754
Net income attributable to TDS shareholders	8						8	8
Net income attributable to noncontrolling interests classified as equity	3							0	3
TDS Common and Series A Common share dividends	(21)						(21)	(21)
TDS Preferred share dividends	(17)						(17)	(17)
Repurchase of Common Shares	(3)				(3)			(3)
Dividend reinvestment plan	1				1			1
Incentive and compensation plans	2		4		9		(11)	2
Adjust investment in subsidiaries for issuances and other compensation plans	0		(3)					(3)	3
Distributions to noncontrolling interests	(1)							0	(1)
Ending balance at Mar. 31, 2023	6,575	1	2,552	1,074	(474)	5	2,658	5,816	759
Beginning balance at Dec. 31, 2023	5,996	1	2,558	1,074	(465)	11	2,023	5,202	794
Net income attributable to TDS shareholders	29						29	29
Net income attributable to noncontrolling interests classified as equity	4							0	4
TDS Common and Series A Common share dividends	(22)						(22)	(22)
TDS Preferred share dividends	(17)						(17)	(17)
Dividend reinvestment plan	1				1		0	1
Incentive and compensation plans	0		1		4		(5)	0
Adjust investment in subsidiaries for issuances and other compensation plans	14		11					11	3
Distributions to noncontrolling interests	(1)							0	(1)
Ending balance at Mar. 31, 2024	$ 6,004	$ 1	$ 2,570	$ 1,074	$ (460)	$ 11	$ 2,008	$ 5,204	$ 800