Hannon Armstrong 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

Equity - Additional Information (Detail)

v3.7.0.1

Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Restricted stock and restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units granted	253,200
Stock units granted average price	$ 18.99
Restricted stock and restricted stock units [Member] \| 2013 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	$ 3	$ 2
Unrecognized compensation expense	$ 20
Weighted-average term in which unrecognized compensation expense is expected to be recognized	2 years
Restricted stock and restricted stock units [Member] \| Employees and Directors [Member] \| 2013 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded	701,982
Restricted stock and restricted stock units [Member] \| Employees and Directors [Member] \| 2013 Plan [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted common shares vesting years	2017
Restricted stock and restricted stock units [Member] \| Employees and Directors [Member] \| 2013 Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted common shares vesting years	2020
Performance Based Restricted Stock Award [Member] \| Employees and Directors [Member] \| 2013 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units granted	4,800,000
Stock units granted average price	$ 18.99

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