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Commitments and Contingencies - PacifiCorp - Commitments Tables (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Contractual Obligation [Line Items]    
Purchase Obligation, Due in Next Twelve Months $ 2,400  
Operating Leases, Future Minimum Payments Due, Next Twelve Months [1]   $ 147
Operating Leases, Future Minimum Payments, Due in Two Years [1]   128
Operating Leases, Future Minimum Payments, Due in Three Years [1]   110
Operating Leases, Future Minimum Payments, Due in Four Years [1]   87
Operating Leases, Future Minimum Payments, Due in Five Years [1]   61
Operating Leases, Future Minimum Payments, Due Thereafter [1]   159
Operating Leases, Future Minimum Payments Due [1]   692
Contractual Obligation, Due in Next Twelve Months 4,631  
Contractual Obligation, Due in Second Year 2,458  
Contractual Obligation, Due in Third Year 1,614  
Contractual Obligation, Due in Fourth Year 1,467  
Contractual Obligation, Due in Fifth Year 1,421  
Contractual Obligation, Due after Fifth Year 17,467  
Contractual Obligation 29,058  
Capital Addition Purchase Commitments [Member]    
Contractual Obligation [Line Items]    
Purchase Obligation, Due in Next Twelve Months 1,682  
Purchase Obligation, Due in Second Year 521  
Purchase Obligation, Due in Third Year 27  
Purchase Obligation, Due in Fourth Year 2  
Purchase Obligation, Due in Fifth Year 8  
Purchase Obligation, Due after Fifth Year 0  
Purchase Obligation 2,240  
Easements [Member]    
Contractual Obligation [Line Items]    
Purchase Obligation, Due in Next Twelve Months 62  
Purchase Obligation, Due in Second Year 68  
Purchase Obligation, Due in Third Year 70  
Purchase Obligation, Due in Fourth Year 72  
Purchase Obligation, Due in Fifth Year 70  
Purchase Obligation, Due after Fifth Year 2,259  
Purchase Obligation 2,601  
Maintenance, service and other contracts [Member]    
Contractual Obligation [Line Items]    
Purchase Obligation, Due in Next Twelve Months 669  
Purchase Obligation, Due in Second Year 342  
Purchase Obligation, Due in Third Year 324  
Purchase Obligation, Due in Fourth Year 300  
Purchase Obligation, Due in Fifth Year 255  
Purchase Obligation, Due after Fifth Year 1,624  
Purchase Obligation 3,514  
PacifiCorp [Member]    
Contractual Obligation [Line Items]    
Operating Leases, Future Minimum Payments Due, Next Twelve Months [2]   3
Operating Leases, Future Minimum Payments, Due in Two Years [2]   3
Operating Leases, Future Minimum Payments, Due in Three Years [2]   3
Operating Leases, Future Minimum Payments, Due in Four Years [2]   2
Operating Leases, Future Minimum Payments, Due in Five Years [2]   2
Operating Leases, Future Minimum Payments, Due Thereafter [2]   7
Operating Leases, Future Minimum Payments Due [2]   20
Contractual Obligation, Due in Next Twelve Months 2,402  
Contractual Obligation, Due in Second Year 901  
Contractual Obligation, Due in Third Year 672  
Contractual Obligation, Due in Fourth Year 583  
Contractual Obligation, Due in Fifth Year 568  
Contractual Obligation, Due after Fifth Year 4,554  
Contractual Obligation $ 9,680  
Rent expense for power purchase agreements meeting definition of operating lease   $ 14
Maximum percentage of energy sources for which a share of operating costs and debt service is required 5.00% 5.00%
Operating leases, rent expense, net  
PacifiCorp [Member] | Purchased electricity contracts - commercially operable    
Contractual Obligation [Line Items]    
Purchase Obligation, Due in Next Twelve Months $ 279  
Purchase Obligation, Due in Second Year 177  
Purchase Obligation, Due in Third Year 174  
Purchase Obligation, Due in Fourth Year 168  
Purchase Obligation, Due in Fifth Year 164  
Purchase Obligation, Due after Fifth Year 1,810  
Purchase Obligation 2,772  
PacifiCorp [Member] | Purchased electricity contracts - not commercially operable    
Contractual Obligation [Line Items]    
Purchase Obligation, Due in Next Twelve Months 7  
Purchase Obligation, Due in Second Year 52  
Purchase Obligation, Due in Third Year 52  
Purchase Obligation, Due in Fourth Year 53  
Purchase Obligation, Due in Fifth Year 53  
Purchase Obligation, Due after Fifth Year 987  
Purchase Obligation 1,204  
PacifiCorp [Member] | Fuel contracts    
Contractual Obligation [Line Items]    
Purchase Obligation, Due in Next Twelve Months 832  
Purchase Obligation, Due in Second Year 519  
Purchase Obligation, Due in Third Year 316  
Purchase Obligation, Due in Fourth Year 245  
Purchase Obligation, Due in Fifth Year 248  
Purchase Obligation, Due after Fifth Year 775  
Purchase Obligation 2,935  
PacifiCorp [Member] | Capital Addition Purchase Commitments [Member]    
Contractual Obligation [Line Items]    
Purchase Obligation, Due in Next Twelve Months 844  
Purchase Obligation, Due in Second Year 6  
Purchase Obligation, Due in Third Year 0  
Purchase Obligation, Due in Fourth Year 0  
Purchase Obligation, Due in Fifth Year 4  
Purchase Obligation, Due after Fifth Year 0  
Purchase Obligation 854  
PacifiCorp [Member] | Transmission    
Contractual Obligation [Line Items]    
Purchase Obligation, Due in Next Twelve Months 101  
Purchase Obligation, Due in Second Year 86  
Purchase Obligation, Due in Third Year 77  
Purchase Obligation, Due in Fourth Year 71  
Purchase Obligation, Due in Fifth Year 56  
Purchase Obligation, Due after Fifth Year 429  
Purchase Obligation 820  
PacifiCorp [Member] | Easements [Member]    
Contractual Obligation [Line Items]    
Purchase Obligation, Due in Next Twelve Months 10  
Purchase Obligation, Due in Second Year 12  
Purchase Obligation, Due in Third Year 12  
Purchase Obligation, Due in Fourth Year 12  
Purchase Obligation, Due in Fifth Year 11  
Purchase Obligation, Due after Fifth Year 349  
Purchase Obligation 406  
PacifiCorp [Member] | Maintenance, service and other contracts [Member]    
Contractual Obligation [Line Items]    
Purchase Obligation, Due in Next Twelve Months 329  
Purchase Obligation, Due in Second Year 49  
Purchase Obligation, Due in Third Year 41  
Purchase Obligation, Due in Fourth Year 34  
Purchase Obligation, Due in Fifth Year 32  
Purchase Obligation, Due after Fifth Year 204  
Purchase Obligation $ 689  
[1] Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".
[2] (1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".