Accounting for Derivative Instruments and Hedging Activities (Tables)

12 Months Ended

Dec. 31, 2016

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative Volumes Expected to Settle

The following table presents TEC’s derivative volumes that, as of December 31, 2016, are expected to settle during the 2017 and 2018 fiscal years:

	Natural Gas Contracts
(millions)	(MMBTUs)
Year	Physical		Financial
2017		0.0		26.0
2018		0.0		6.8
Total		0.0		32.8