Restricted Cash	3 Months Ended
Jan. 31, 2015
Restricted Cash and Investments [Abstract]
Restricted cash	Restricted Cash As of January 31, 2015, there was $27.3 million of cash and cash equivalents was pledged as collateral for letters of credit for certain banking requirements and contractual commitments, compared to $25.1 million of cash and cash equivalents pledged as of October 31, 2014. The restricted cash balance for both periods presented includes $15.0 million which has been placed in a Grantor's Trust account to secure certain FuelCell Energy obligations under a 15-year service agreement and has been classified as long-term. As of January 31, 2015, outstanding letters of credit totaled $9.6 million compared to $7.4 million as of October 31, 2014. These expire on various dates through April 2019.

Restricted Cash

3 Months Ended

Jan. 31, 2015

Restricted Cash and Investments [Abstract]

Restricted Cash

As of January 31, 2015, there was $27.3 million of cash and cash equivalents was pledged as collateral for letters of credit for certain banking requirements and contractual commitments, compared to $25.1 million of cash and cash equivalents pledged as of October 31, 2014. The restricted cash balance for both periods presented includes $15.0 million which has been placed in a Grantor's Trust account to secure certain FuelCell Energy obligations under a 15-year service agreement and has been classified as long-term. As of January 31, 2015, outstanding letters of credit totaled $9.6 million compared to $7.4 million as of October 31, 2014. These expire on various dates through April 2019.