XML 140 R93.htm IDEA: XBRL DOCUMENT v3.6.0.2
Leases And Palisades Financing (Narrative) (Details)
$ in Millions
1 Months Ended 12 Months Ended
Dec. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
MW
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Consumers Energy Company [Member]        
Leases [Line Items]        
Finance Lease Term   15 years    
Coal-Carrying Railcars [Member] | Consumers Energy Company [Member]        
Leases [Line Items]        
Operating leases without extension provisions, remaining term   7 years    
Operating leases with extension provisions, remaining term   10 years    
Gas Transportation Pipeline into Karn [Member] | Consumers Energy Company [Member]        
Leases [Line Items]        
Capital Lease Term   15 years    
Capital Lease Remaining Term   5 years    
Gas Transportation Pipeline into Zeeland [Member] | Consumers Energy Company [Member]        
Leases [Line Items]        
Capital Lease Term   5 years    
Capital lease renewal term   5 years    
Capital Lease Remaining Term   1 year    
Minimum [Member] | Coal-Carrying Railcars [Member] | Consumers Energy Company [Member]        
Leases [Line Items]        
Operating leases, term   1 year    
Minimum [Member] | Long-term PPAs [Member] | Consumers Energy Company [Member]        
Leases [Line Items]        
Lease term   1 year    
Maximum [Member] | Coal-Carrying Railcars [Member] | Consumers Energy Company [Member]        
Leases [Line Items]        
Operating leases, term   15 years    
Maximum [Member] | Vehicle Fleet Operations [Member] | Consumers Energy Company [Member]        
Leases [Line Items]        
Capital Lease Term   120 months    
Maximum [Member] | Long-term PPAs [Member] | Consumers Energy Company [Member]        
Leases [Line Items]        
Lease term   16 years    
Financing Leases [Member]        
Leases [Line Items]        
Finance Leases Lessee Balance Sheet Assets Amortization And Interest Charges | $ $ 17 $ 17 $ 18 $ 19
Financing Leases [Member] | Consumers Energy Company [Member]        
Leases [Line Items]        
Lease termination cost | $ $ 172      
Palisades PPA [Member]        
Leases [Line Items]        
Unrecorded Unconditional Purchase Obligations, Maximum Quantity | MW   798    
Palisades PPA [Member] | Consumers Energy Company [Member]        
Leases [Line Items]        
Unrecorded Unconditional Purchase Obligations, Maximum Quantity | MW   798