CONSOLIDATED STATEMENTS OF STOCKHOLDER'S EQUITY (DEFICIT) - USD ($) $ in Millions	Total	COMMON STOCK	RETAINED EARNINGS (ACCUMULATED DEFICIT)
Balance at beginning of period at Dec. 31, 2016		$ 10,050	$ (1,358)
Increase (Decrease) in Stockholder's Equity
Net income	$ 1,657		1,657
Dividends declared to Qwest Services Corporation	(1,000)		(1,000)
Dividend of equity interest in limited liability company to Qwest Services Corporation			(12)
Balance at end of period at Dec. 31, 2017	9,337	10,050	(713)
Increase (Decrease) in Stockholder's Equity
Net income	1,665		1,665
Dividends declared to Qwest Services Corporation	(1,275)		(1,275)
Balance at end of period at Dec. 31, 2018	9,868	10,050	(182)
Increase (Decrease) in Stockholder's Equity
Cumulative net effect of adoption of ASU 2014-09, Revenue from Contracts with Customers, net of $—, ($49), and $— taxes			141
Net income	1,827		1,827
Dividends declared to Qwest Services Corporation	(1,600)		(1,600)
Balance at end of period at Dec. 31, 2019	$ 10,117	$ 10,050	67
Increase (Decrease) in Stockholder's Equity
Cumulative net effect of adoption of ASU 2014-09, Revenue from Contracts with Customers, net of $—, ($49), and $— taxes | Accounting Standards Update 2016-02			$ 22