Commodity And Other Derivative Contractual Assets And Liabilities (Derivative Volumes) (Details)
lb in Thousands, gal in Millions, T in Millions, MMBTU in Millions

Jun. 30, 2016

MMBTU

GWh

gal

Dec. 31, 2015

MMBTU

GWh

gal

Natural Gas Derivative [Member]

Derivatives, Fair Value [Line Items]

Nonmonetary Notional Volume | MMBTU

^[1]

1,773

1,489

Electricity (in GWh) [Member]

Derivatives, Fair Value [Line Items]

Nonmonetary Notional Volume

95,732

58,022

Congestion Revenue RIghts (in GWh) [Member]

Derivatives, Fair Value [Line Items]

Nonmonetary Notional Volume

^[1]

121,748

106,260

Coal (in tons) [Member]

Derivatives, Fair Value [Line Items]

Nonmonetary Notional Volume | T

Fuel oil (in gallons) [Member]

Derivatives, Fair Value [Line Items]

Nonmonetary Notional Volume | gal

Uranium (in pounds) [Member]

Derivatives, Fair Value [Line Items]

Nonmonetary Notional Volume | lb

375

[1]	Represents gross forward purchases associated with instruments used to hedge electricity price differences between settlement points within ERCOT.

Energy Future Competitive Holdings Co LLC 10-Q