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RELATED PARTY TRANSACTIONS - Pre-Closing Bridge Notes (Details)	Nov. 02, 2021 USD ($)	Sep. 30, 2023 USD ($)
Series D Preferred Stock \| Subsequent event
RELATED PARTY TRANSACTIONS
Percent of discount		50.00%
If the proposed Business Combination is not completed on or before September 30, 2023 \| Subsequent event \| Better HoldCo, Inc. \| Common Stock
RELATED PARTY TRANSACTIONS
Amount of pre-money equity valuation		$ 6,900,000,000
If the proposed Business Combination is not completed on or before September 30, 2023 \| Class B ordinary shares \| Subsequent event \| Better HoldCo, Inc.
RELATED PARTY TRANSACTIONS
Percent of discount		75.00%
Amount of pre-money equity valuation		$ 6,900,000,000
If the proposed Business Combination is not completed on or before September 30, 2023 \| Class B ordinary shares \| Subsequent event \| Better HoldCo, Inc. \| Common Stock
RELATED PARTY TRANSACTIONS
Amount of pre-money equity valuation		$ 6,900,000,000
Bridge Note Purchase Agreement \| SB Northstar LP
RELATED PARTY TRANSACTIONS
Bridge notes purchased	$ 650,000,000
Bridge Note Purchase Agreement \| Sponsor
RELATED PARTY TRANSACTIONS
Bridge notes purchased	100,000,000
Bridge Note Purchase Agreement \| Better HoldCo, Inc.
RELATED PARTY TRANSACTIONS
Bridge notes issued	$ 750,000,000
Conversion rate of bridge notes into Better Class A common stock	1
Consideration amount	$ 10