Rendering

Component: (Network and Table)
Network
2401407 - Disclosure - Summary of Significant Accounting Policies Materials, Supplies, and Inventories (Details)
(http://www.wecenergygroup.com/role/SummaryOfSignificantAccountingPoliciesMaterialsSuppliesAndInventoriesDetails)
TableInventory, Current [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000783325 (http://www.sec.gov/CIK)
InventoryPeriod [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
Legal Entity [Axis]Legal Entity [Axis]
PGL and NSGEntity [Domain]PGL and NSGEntity [Domain]
Natural gas in storage
 
223,100,000  
 
284,100,000  
Materials and supplies
 
206,500,000  
 
219,200,000  
Fossil fuel
 
158,000,000  
 
183,700,000  
Total
 
 
587,600,000  
 
 
 
687,000,000  
 
Percentage of LIFO inventory
 
18.00%  
 
18.00%  
Excess of replacement or current costs over stated LIFO value
92,900,000  
 
15,200,000  
 
Natural gas price benchmark
3.63  
 
2.48