CONSOLIDATED STATEMENTS OF STOCKHOLDER'S EQUITY - USD ($) $ in Millions	Total	COMMON STOCK	RETAINED EARNINGS	RETAINED EARNINGS 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	$ 933		933
Dividends declared and paid to Qwest Services Corporation	(925)		(925)
Other			(5)
Balance at end of period at Jun. 30, 2020	10,123	10,050	73
Balance at beginning of period at Mar. 31, 2020		10,050	68
Increase (Decrease) in Stockholder's Equity
Net income	430		430
Dividends declared and paid to Qwest Services Corporation			(425)
Other			0
Balance at end of period at Jun. 30, 2020	10,123	10,050	73
Balance at beginning of period at Dec. 31, 2020	10,098	10,050	48
Increase (Decrease) in Stockholder's Equity
Net income	991		991
Dividends declared and paid to Qwest Services Corporation	(570)		(570)
Other			0
Balance at end of period at Jun. 30, 2021	10,519	10,050	469
Balance at beginning of period at Mar. 31, 2021		10,050	230
Increase (Decrease) in Stockholder's Equity
Net income	509		509
Dividends declared and paid to Qwest Services Corporation			(270)
Other			0
Balance at end of period at Jun. 30, 2021	$ 10,519	$ 10,050	$ 469