HA Sustainable Infrastructure Capital, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Long-term Debt - Additional Information (Details)

v3.10.0.1

Long-term Debt - Additional Information (Details) $ / shares in Units, shares in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($) $ / shares shares
Debt Instrument [Line Items]
Principal, net of issuance costs	$ 1,198,000,000		$ 1,198,000,000		$ 1,211,000,000
Total interest expense	19,033,000	$ 15,361,000	37,744,000	$ 29,144,000
SunPower Corporation [Member] \| Residential Solar Loan [Member]
Debt Instrument [Line Items]
Payment of principal and interest on loan			1,000,000
4.125% Convertible Senior Notes Due September 1, 2022 [Member] \| Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate					4.125%
Principal	150,000,000		150,000,000		$ 150,000,000
Principal, net of issuance costs					$ 145,000,000
Conversion rate of shares for each $1,000 principal amount of convertible notes					36.7107
Conversion price per share (in usd per share) \| $ / shares					$ 27.24
Conversion of debt equals shares \| shares					5.5
Adjustment for dividends declared (in usd per share) \| $ / shares					$ 0.33
Redemption price, percentage					100.00%
Total interest expense	$ 2,000,000		$ 4,000,000

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