Commitments

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

LEASES — The Company enters into long-term non-cancelable lease arrangements which, for accounting purposes, are classified as either operating or capital leases. Operating leases primarily include certain transmission lines, office rental and site leases. Operating lease rental expense for the years ended December 31, 2018, 2017, and 2016 was $51 million, $61 million and $61 million, respectively. Capital leases primarily include transmission lines, vehicles, offices, and other operating equipment. Capital leases are recognized in Property, Plant and Equipment within Electric generation, distribution assets and other. The gross value of the capital lease assets as of December 31, 2018 and 2017 was $13 million and $27 million, respectively. The following table shows the future minimum lease payments under operating and capital leases for continuing operations together with the present value of the net minimum lease payments under capital leases as of December 31, 2018 for 2019 through 2023 and thereafter (in millions):



	Future Commitments for
December 31,	Capital Leases			Operating Leases
2019	$	1		$	74
2020	1			38
2021	1			25
2022	1			26
2023	1			25
Thereafter	7			455
Total	$	12		$	643
Less: Imputed interest	(6		)
Present value of total minimum lease payments	$	6

CONTRACTS — The Company enters into long-term contracts for construction projects, maintenance and service, transmission of electricity, operations services and purchases of electricity and fuel. In general, these contracts are subject to variable quantities or prices and are terminable only in limited circumstances. The following table shows the future minimum commitments for continuing operations under these contracts as of December 31,

2018 for 2019 through 2023 and thereafter as well as actual purchases under these contracts for the years ended December 31, 2018, 2017, and 2016 (in millions):



Actual purchases during the year ended December 31,	Electricity Purchase Contracts		Fuel Purchase Contracts		Other Purchase Contracts
2016	$	420	$	1,790	$	817
2017	747		1,619		1,945
2018	827		1,838		1,671
Future commitments for the year ending December 31,
2019	$	786	$	1,494	$	1,375
2020	602		1,027		681
2021	371		882		336
2022	234		575		561
2023	393		463		213
Thereafter	5,187		1,734		778
Total	$	7,573	$	6,175	$	3,944