Consolidated Statements of Changes in Convertible Preferred Stock and Stockholders’ Equity (Deficit) - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Total Hippo Stockholders' Equity (Deficit )	Non controlling Interests
Beginning balance (in shares) at Dec. 31, 2020	305,887,443
Beginning balance at Dec. 31, 2020	$ 344.8
Ending balance (in shares) at Mar. 31, 2021	305,887,443
Ending balance at Mar. 31, 2021	$ 344.8
Beginning balance (in shares) at Dec. 31, 2020		92,547,014
Beginning balance at Dec. 31, 2020	(199.5)	$ 0.0	$ 56.9	$ 0.1	$ (256.6)	$ (199.6)	$ 0.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(194.9)				(195.2)	(195.2)	0.3
Other comprehensive income (loss)	(0.6)			(0.6)		(0.6)
Issuance of common stock from stock plans (in shares)		4,776,164
Issuance of common stock from stock plans	2.1		2.1			2.1
Repurchase of common stock (in shares)		(21,732)
Stock-based compensation expense	2.9		2.9			2.9
Other	0.0				(0.1)	(0.1)	0.1
Ending balance (in shares) at Mar. 31, 2021		97,301,446
Ending balance at Mar. 31, 2021	$ (390.0)	$ 0.0	61.9	(0.5)	(451.9)	(390.5)	0.5
Beginning balance (in shares) at Dec. 31, 2020	305,887,443
Beginning balance at Dec. 31, 2020	$ 344.8
Ending balance (in shares) at Jun. 30, 2021	305,887,443
Ending balance at Jun. 30, 2021	$ 344.8
Beginning balance (in shares) at Dec. 31, 2020		92,547,014
Beginning balance at Dec. 31, 2020	(199.5)	$ 0.0	56.9	0.1	(256.6)	(199.6)	0.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(278.7)
Ending balance (in shares) at Jun. 30, 2021		98,756,703
Ending balance at Jun. 30, 2021	$ (469.6)	$ 0.0	65.8	(0.3)	(536.4)	(470.9)	1.3
Beginning balance (in shares) at Mar. 31, 2021	305,887,443
Beginning balance at Mar. 31, 2021	$ 344.8
Ending balance (in shares) at Jun. 30, 2021	305,887,443
Ending balance at Jun. 30, 2021	$ 344.8
Beginning balance (in shares) at Mar. 31, 2021		97,301,446
Beginning balance at Mar. 31, 2021	(390.0)	$ 0.0	61.9	(0.5)	(451.9)	(390.5)	0.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(83.7)				(84.5)	(84.5)	0.8
Other comprehensive income (loss)	0.2			0.2		0.2
Issuance of common stock from stock plans (in shares)		1,455,257
Issuance of common stock from stock plans	0.8		0.8			0.8
Stock-based compensation expense	3.1		3.1			3.1
Ending balance (in shares) at Jun. 30, 2021		98,756,703
Ending balance at Jun. 30, 2021	$ (469.6)	$ 0.0	65.8	(0.3)	(536.4)	(470.9)	1.3
Beginning balance (in shares) at Dec. 31, 2021	0
Beginning balance at Dec. 31, 2021	$ 0.0
Ending balance (in shares) at Mar. 31, 2022	0
Ending balance at Mar. 31, 2022	$ 0.0
Beginning balance (in shares) at Dec. 31, 2021	565,031,129	565,031,129
Beginning balance at Dec. 31, 2021	$ 861.7	$ 0.0	1,488.3	(0.7)	(628.0)	859.6	2.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(66.5)				(67.6)	(67.6)	1.1
Other comprehensive income (loss)	(2.6)			(2.6)		(2.6)
Issuance of common stock from stock plans (in shares)		2,722,887
Issuance of common stock from stock plans	1.4		1.4			1.4
Shares withheld related to net share settlement	(1.0)		(1.0)			(1.0)
Stock-based compensation expense	15.7		15.7			15.7
Ending balance (in shares) at Mar. 31, 2022		567,754,016
Ending balance at Mar. 31, 2022	$ 808.7	$ 0.0	1,504.4	(3.3)	(695.6)	805.5	3.2
Beginning balance (in shares) at Dec. 31, 2021	0
Beginning balance at Dec. 31, 2021	$ 0.0
Ending balance (in shares) at Jun. 30, 2022	0
Ending balance at Jun. 30, 2022	$ 0.0
Beginning balance (in shares) at Dec. 31, 2021	565,031,129	565,031,129
Beginning balance at Dec. 31, 2021	$ 861.7	$ 0.0	1,488.3	(0.7)	(628.0)	859.6	2.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ (138.5)
Issuance of common stock from stock plans (in shares)	2,754,832
Ending balance (in shares) at Jun. 30, 2022	572,362,393	572,362,393
Ending balance at Jun. 30, 2022	$ 751.4	$ 0.0	1,522.8	(4.9)	(768.8)	749.1	2.3
Beginning balance (in shares) at Mar. 31, 2022	0
Beginning balance at Mar. 31, 2022	$ 0.0
Ending balance (in shares) at Jun. 30, 2022	0
Ending balance at Jun. 30, 2022	$ 0.0
Beginning balance (in shares) at Mar. 31, 2022		567,754,016
Beginning balance at Mar. 31, 2022	808.7	$ 0.0	1,504.4	(3.3)	(695.6)	805.5	3.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(72.0)				(73.5)	(73.5)	1.5
Other comprehensive income (loss)	(1.6)			(1.6)		(1.6)
Issuance of common stock from stock plans (in shares)		4,698,351
Issuance of common stock from stock plans	2.3		2.3			2.3
Shares withheld related to net share settlement	(1.7)		(1.7)			(1.7)
Repurchase of common stock (in shares)		(89,974)
Stock-based compensation expense	17.8		17.8			17.8
Other	$ (2.1)				0.3	0.3	(2.4)
Ending balance (in shares) at Jun. 30, 2022	572,362,393	572,362,393
Ending balance at Jun. 30, 2022	$ 751.4	$ 0.0	$ 1,522.8	$ (4.9)	$ (768.8)	$ 749.1	$ 2.3