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Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands					12 Months Ended
	Nov. 02, 2021	Feb. 22, 2021	Jul. 03, 2018	Jul. 06, 2016	Dec. 31, 2021
Financial Assurances
Equity contribution guarantees					$ 2,000
Production tax credit guarantees					37,000
2017 Settlement Agreement and its Customer Education and Outreach Plan \| Arizona Public Service Company
Arizona Attorney General [Abstract]
Settlement amount		$ 24,750
Settlement amount returned to customers		$ 24,000
Letter of Credit \| Arizona Public Service Company
Financial Assurances
Outstanding letters of credit					5,000
Four Corners Units 4 and 5 \| Arizona Public Service Company \| SCE
Four Corners SCR Cost Recovery [Abstract]
Recommended rate adjustment, annualized customer impact, disallowance of investments	$ 194,000
Recommended rate adjustment, annualized customer impact, cost deferrals	$ 215,500
Potential charges					154,400
Four Corners \| NTEC
Environmental Matters
Option to purchase, ownership interest (as a percent)			7.00%	7.00%
Payment received for coal supply agreement			$ 70,000
Four Corners \| 4CA
Environmental Matters
Percentage share cost of control				7.00%
Remaining balance of notes					$ 9,200
Regional Haze Rules \| Four Corners Units 4 and 5 \| Arizona Public Service Company
Environmental Matters
Percentage share cost of control					63.00%
Expected environmental cost					$ 400,000
Regional Haze Rules \| Four Corners Units 4 and 5 \| Four Corners \| Arizona Public Service Company
Environmental Matters
Additional expected environment cost					$ 45,000
Regional Haze Rules \| Four Corners Units 4 and 5 \| Natural Gas Tolling Letter of Credit \| Arizona Public Service Company
Environmental Matters
Additional percentage share of cost of control					7.00%
Coal Combustion Waste \| Four Corners \| Arizona Public Service Company
Environmental Matters
Additional expected environment cost					$ 30,000
Coal Combustion Waste \| Navajo Generating Station \| Arizona Public Service Company
Environmental Matters
Additional expected environment cost					1,000
Coal Combustion Waste \| Minimum \| Cholla \| Arizona Public Service Company
Environmental Matters
Additional expected environment cost					16,000
Coal Combustion Waste \| Minimum \| Cholla and Four Corners \| Arizona Public Service Company
Environmental Matters
Additional expected environment cost					10,000
Coal Combustion Waste \| Maximum \| Cholla and Four Corners \| Arizona Public Service Company
Environmental Matters
Additional expected environment cost					15,000
Surety Bonds Expiring in 2020 \| Arizona Public Service Company
Financial Assurances
Surety bonds expiring, amount					$ 14,000