CONSOLIDATED STATEMENTS OF STOCKHOLDER'S EQUITY - USD ($) $ in Millions	Total	COMMON STOCK	RETAINED EARNINGS (ACCUMULATED DEFICIT)	RETAINED EARNINGS (ACCUMULATED DEFICIT) Cumulative Effect, Period of Adoption, Adjustment
Balance at beginning of period at Dec. 31, 2019		$ 10,050	$ 67	$ 3
Increase (Decrease) in Stockholder's Equity
Net income	$ 503		503
Dividends declared and paid to Qwest Services Corporation	(500)		(500)
Other			(5)
Balance at end of period at Mar. 31, 2020	10,118	10,050	68
Balance at beginning of period at Dec. 31, 2020	10,098	10,050	48
Increase (Decrease) in Stockholder's Equity
Net income	482		482
Dividends declared and paid to Qwest Services Corporation	(300)		(300)
Other			0
Balance at end of period at Mar. 31, 2021	$ 10,280	$ 10,050	$ 230