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, 2018		$ 10,050	$ (182)	$ 22
Increase (Decrease) in Stockholder's Equity
Net income	$ 964		964
Dividends declared to Qwest Services Corporation	(700)		(700)
Balance at end of period at Jun. 30, 2019	10,154	10,050	104
Balance at beginning of period at Mar. 31, 2019		10,050	(23)
Increase (Decrease) in Stockholder's Equity
Net income	477		477
Dividends declared to Qwest Services Corporation			(350)
Balance at end of period at Jun. 30, 2019	10,154	10,050	104
Balance at beginning of period at Dec. 31, 2019	10,117	10,050	67	$ 3
Increase (Decrease) in Stockholder's Equity
Net income	933		933
Dividends declared 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 to Qwest Services Corporation			(425)
Balance at end of period at Jun. 30, 2020	$ 10,123	$ 10,050	$ 73