Net Income (Loss) per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Numerator:
Net income (loss) attributable to Liberty Energy Inc. stockholders	$ 162,655	$ (5,376)
Denominator:
Basic weighted average shares outstanding (in shares)	176,569	183,999
Basic net income (loss) per share attributable to Liberty Energy Inc. stockholders (in dollars per share)	$ 0.92	$ (0.03)
Numerator:
Net income (loss) attributable to Liberty Energy Inc. stockholders	$ 162,655	$ (5,376)
Effect of exchange of the shares of Class B Common Stock for shares of Class A Common Stock	70	0
Diluted net income (loss) attributable to Liberty Energy Inc. stockholders	$ 162,725	$ (5,376)
Denominator:
Basic weighted average shares outstanding (in shares)	176,569	183,999
Effect of dilutive securities:
Restricted stock units (in shares)	4,433	0
Class B Common Stock (in shares)	86	0
Diluted weighted average shares outstanding (in shares)	181,088	183,999
Diluted net income (loss) per share attributable to Liberty Energy Inc. stockholders (in dollars per share)	$ 0.90	$ (0.03)