Repurchases of Lumen Common Stock (Details) - USD ($) $ / shares in Units, shares in Millions			12 Months Ended
	Nov. 02, 2022	Aug. 03, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Equity [Abstract]
Repurchase program, period	2 years	24 months
Repurchase program, authorized amount	$ 1,500,000,000	$ 1,000,000,000
Number of shares repurchased			33.0	80.9
Repurchases of common stock			$ 200,000,000	$ 1,000,000,000
Average purchase price (in dollars per share)			$ 6.07	$ 12.36
COMMON STOCK
Equity [Abstract]
Repurchases of common stock			$ 33,000,000	$ 81,000,000	$ 0
Equity, Class of Treasury Stock [Line Items]
Repurchased common stock that were retired			33,000,000	81,000,000
ADDITIONAL PAID-IN CAPITAL
Equity [Abstract]
Repurchases of common stock			167,000,000	919,000,000	$ 0
Equity, Class of Treasury Stock [Line Items]
Repurchased common stock that were retired			$ 167,000,000	$ 919,000,000