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Bank segment (HEI only) - FHLB Advances and Borrowings (Details) - American Savings Bank (ASB) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB advances	$ 200.0	$ 414.0
FHLB advances, unused funds	1,900.0	$ 1,600.0
Federal Reserve Bank Advances
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Maximum borrowing amount	$ 550.0
Weighted-average interest rate (as percent)	4.37%
Book value of investment securities	$ 804.3

X

- Definition

Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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- Definition

Amount of assets pledged to secure a debt instrument.

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- Definition

Amount of advances or credit lines available from the Federal Home Loan Bank (FHLB).

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- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Weighted average interest rate of short-term debt outstanding calculated at point in time.

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