Commitments and Contingencies (Power Purchase Agreement - Operating and Capital Leases) (Details) - SCE $ in Millions	Dec. 31, 2018 USD ($) contract
Operating Leases
Operating Leases
2019	$ 148
2020	124
2021	103
2022	79
2023	47
Thereafter	536
Total future commitments	1,037
Capital Leases
Capital Leases
2019	5
2020	6
2021	6
2022	6
2023	5
Thereafter	66
Total future commitments	94
Amount representing executory costs	(25)
Amount representing interest	(33)
Net commitments	36
Capital leases commencing in 2019
Capital Leases
Net commitments	$ 26
Number contracts \| contract	2

The number of units (items of property) under capital lease arrangements.

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Amount of minimum lease payments for capital leases.

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Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amounts to be paid by lessee to lessor for maintenance, insurance, and tax expenses related to the leased asset.

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Amount necessary to reduce net minimum lease payments to present value for capital leases.

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Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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