Net Loss per share - Basic and Diluted Per Share Computations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator – basic and diluted:
Net loss	$ (51,749)	$ (50,511)	$ (44,859)	$ (1,592,548)	$ (27,641)	$ (43,321)	$ (147,119)	$ (1,663,509)
Less: Net loss attributable to noncontrolling interest	(34,418)			(1,124,416)			(98,964)	(1,184,352)
Net loss attributable to Bakkt Holdings, Inc. – basic	(17,331)			(468,132)			(48,155)	(479,157)
Net loss and tax effect attributable to noncontrolling interests	0			0			0	0
Net loss attributable to Bakkt Holdings, Inc. – diluted	$ (17,331)			$ (468,132)			$ (48,155)	$ (479,157)
Denominator – basic and diluted:
Weighted average shares outstanding – basic (in shares)	91,357,858			76,591,676			87,726,210	68,408,530
Weighted average shares outstanding – diluted (in shares)	91,357,858			76,591,676			87,726,210	68,408,530
Net loss per share – basic (in dollars per share)	$ (0.19)			$ (6.11)			$ (0.55)	$ (7.00)
Net loss per share – diluted (in dollars per share)	$ (0.19)			$ (6.11)			$ (0.55)	$ (7.00)