Income Taxes - MidAmerican Funding - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Deferred income tax assets:
Regulatory liabilities	$ 1,290	$ 1,248
AROs	347	318
Other	649	629
Total deferred income tax assets	3,406	3,400
Valuation allowances	(78)	(142)
Total deferred income tax assets, net	3,328	3,258
Deferred income tax liabilities:
Property-related items	(12,949)	(12,596)
Regulatory assets	(1,124)	(1,034)
Other	(378)	(491)
Total deferred income tax liabilities	(15,956)	(15,695)
Net deferred income tax liability	(12,628)	(12,437)
MidAmerican Funding, LLC
Deferred income tax assets:
Regulatory liabilities	249	218
AROs	216	204
Revenue sharing	47	34
State carryforwards	66	68
Employee benefits	10	25
Other	81	69
Total deferred income tax assets	669	618
Valuation allowances	(2)	(2)
Total deferred income tax assets, net	667	616
Deferred income tax liabilities:
Property-related items	(4,154)	(3,972)
Regulatory assets	(134)	(134)
Other	(3)	(2)
Total deferred income tax liabilities	(4,291)	(4,108)
Net deferred income tax liability	$ (3,624)	$ (3,492)