Repurchases of Lumen Common Stock (Details) - USD ($) $ / shares in Units, shares in Millions		12 Months Ended
	Aug. 03, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity [Abstract]
Repurchase program, period	24 months
Repurchase program, authorized amount	$ 1,000,000,000
Number of shares repurchased		80.9
Repurchases of common stock		$ 1,000,000,000
Average purchase price (in dollars per share)		$ 12.36
Common Stock
Equity [Abstract]
Repurchases of common stock		$ 81,000,000	$ 0	$ 0
Equity, Class of Treasury Stock [Line Items]
Repurchased common stock that were retired		81,000,000
Additional Paid-in Capital
Equity [Abstract]
Repurchases of common stock		919,000,000	$ 0	$ 0
Equity, Class of Treasury Stock [Line Items]
Repurchased common stock that were retired		$ 919,000,000