Derivative, Notional Amount Settled

No definition available.

Name:	hasi_DerivativeNotionalAmountSettled
Namespace Prefix:	hasi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

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Period Type:	duration

- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

- Definition

Cap rate on an interest rate derivative such as an interest rate cap or collar. If market rates exceed the cap rate, a payment or receipt is triggered on the contract.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeCapInterestRate
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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Floor rate on an interest rate derivative such as an interest rate floor or collar. If market rates falls below the floor rate, a payment or receipt is triggered on the contract.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

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Balance Type:	na
Period Type:	instant

- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

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- Definition

Fair value as of the balance sheet date of interest rate derivative assets, net of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized on the balance sheet.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

The cash inflow provided by derivative instruments during the period, which are classified as financing activities, excluding those designated as hedging instruments.

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- Details

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Namespace Prefix:
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Period Type:

- Details

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- Details

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- Details

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Long-term Debt - Schedule of Interest Rate Swaps (Details) $ in Millions	3 Months Ended
	Jun. 30, 2025 USD ($) derivative	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Notional Value	$ 1,740
Fair Value as of	$ 14		$ 67
1 month SOFR \| 3.79 Percent Interest Rate Swaps
Debt Instrument [Line Items]
Hedged Rate	3.79%
Notional Value	$ 200
Fair Value as of	(4)		3
1 month SOFR \| 3.70 - 4.00 Percent Interest Rate Collar
Debt Instrument [Line Items]
Notional Value	250
Fair Value as of	$ 0		0
1 month SOFR \| 3.70 - 4.00 Percent Interest Rate Collar \| Minimum
Debt Instrument [Line Items]
Hedged Rate	3.70%
1 month SOFR \| 3.70 - 4.00 Percent Interest Rate Collar \| Maximum
Debt Instrument [Line Items]
Hedged Rate	4.00%
Overnight SOFR \| 2.98 Percent Interest Rate Swaps
Debt Instrument [Line Items]
Hedged Rate	2.98%
Notional Value	$ 150	$ 400
Fair Value as of	5		24
Derivative settled	250
Proceeds	$ 11
Overnight SOFR \| 3.09 Percent Interest Rate Swaps
Debt Instrument [Line Items]
Hedged Rate	3.09%
Notional Value	$ 600
Fair Value as of	$ 16		32
Overnight SOFR \| 3.70 - 4.00 Percent Interest Rate Collar \| Minimum
Debt Instrument [Line Items]
Interest rate floor	3.70%
Overnight SOFR \| 3.70 - 4.00 Percent Interest Rate Collar \| Maximum
Debt Instrument [Line Items]
Interest rate cap	4.00%
Overnight SOFR \| 4.39 - 4.42 Percent Interest Rate Swaps
Debt Instrument [Line Items]
Notional Value	$ 165
Fair Value as of	$ (7)		(3)
Number of interest rate swaps \| derivative	3
Overnight SOFR \| 4.39 - 4.42 Percent Interest Rate Swaps \| Minimum
Debt Instrument [Line Items]
Hedged Rate	4.39%
Overnight SOFR \| 4.39 - 4.42 Percent Interest Rate Swaps \| Maximum
Debt Instrument [Line Items]
Hedged Rate	4.42%
Overnight SOFR \| 3.72 Percent Interest Rate Swaps
Debt Instrument [Line Items]
Hedged Rate	3.72%
Notional Value	$ 375
Fair Value as of	$ 4		$ 11