Leases (Lease Payments) (Details) - SCE - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Operating Leases
Lease liabilities	$ 1,925	$ 1,085
Finance Leases
2022	1
2023	1
Thereafter	5
Total lease payments	7
Amount representing interest	4
Lease liabilities	3	$ 4
PPA Operating Leases
Operating Leases
2022	579
2023	482
2024	73
2025	73
2026	70
Thereafter	698
Total lease payments	1,975
Amount representing interest	262
Lease liabilities	1,713
Other operating leases
Operating Leases
2022	44
2023	36
2024	30
2025	27
2026	24
Thereafter	110
Total lease payments	271
Amount representing interest	59
Lease liabilities	$ 212