Rendering

Component: (Network and Table)
Network
100840 - Disclosure - Asset Retirement Obligations - Schedule of Asset Retirement Obligations (Detail)
(http://www.tecoenergy.com/20161231/taxonomy/role/DisclosureAssetRetirementObligationsScheduleOfAssetRetirementObligationsDetail)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000096271 (http://www.sec.gov/CIK)
Asset Retirement Obligation Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
Asset Retirement Obligation Disclosure [Abstract]
 
 
Beginning balance
6,000,000  
5,300,000  
Additional liabilities
36,400,000  
900,000  
Revisions to estimated cash flows
2,600,000  
(500,000) 
Other
(100,000) 
300,000  
Ending balance
44,900,000  
 
6,000,000