v3.26.1
Segment Information - MidAmerican Funding, LLC (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
segment
operatingSegment
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Segment Reporting [Line Items]          
Number of reportable segments | operatingSegment     8    
Revenues $ 6,686 $ 6,394 $ 13,358 $ 12,760  
Cost of sales 1,376 1,434 3,046 2,965  
Operating income 1,278 1,004 2,736 2,387  
Interest expense (791) (709) (1,537) (1,395)  
Interest and dividend income 67 63 121 125  
Income tax expense (benefit) (333) (357) (763) (756)  
Other segment items (65) (80) (256) (162)  
Net income (loss) attributable to parent 891 702 2,005 1,889  
Capital expenditures 2,531 2,445 4,949 4,573  
Assets 154,029   154,029   $ 148,327
Goodwill 11,374   $ 11,374   11,521
MidAmerican Funding, LLC          
Segment Reporting [Line Items]          
Number of reportable segments | segment     2    
Revenues 872 860 $ 2,012 1,874  
Cost of sales 196 211 680 580  
Operations and maintenance 231 236 451 463  
Depreciation and amortization 282 255 559 562  
Property and other taxes 42 44 90 88  
Operating income 121 114 232 181  
Interest expense (111) (105) (220) (210)  
Interest and dividend income 6 7 12 14  
Income tax expense (benefit) (193) (181) (411) (417)  
Other segment items 51 46 70 69  
Net income (loss) attributable to parent 260 243 505 471  
Capital expenditures 470 335 888 740  
Assets 29,363   29,363   28,918
Goodwill 1,270   1,270   1,270
MidAmerican Funding, LLC | Other          
Segment Reporting [Line Items]          
Revenues 1 1 4 3  
Cost of sales 0 1 0 1  
Operations and maintenance 0 1 0 2  
Depreciation and amortization 0 0 0 0  
Property and other taxes 0 0 0 0  
Operating income 1 (1) 4 0  
Interest expense (5) (5) (9) (9)  
Interest and dividend income 0 0 0 0  
Income tax expense (benefit) 0 (1) (1) (1)  
Other segment items 1 0 0 (1)  
Net income (loss) attributable to parent (3) (5) (4) (9)  
Capital expenditures 0 1 0 1  
Assets 11   11   8
MidAmerican Funding, LLC | Electric | Operating segments          
Segment Reporting [Line Items]          
Revenues 760 743 1,507 1,410  
Cost of sales 146 153 340 277  
Operations and maintenance 185 201 366 394  
Depreciation and amortization 264 238 523 528  
Property and other taxes 38 41 81 81  
Operating income 127 110 197 130  
Interest expense (98) (93) (194) (186)  
Interest and dividend income 6 7 11 13  
Income tax expense (benefit) (190) (180) (414) (426)  
Other segment items 42 41 65 64  
Net income (loss) attributable to parent 267 245 493 447  
Capital expenditures 441 309 835 683  
Assets 27,171   27,171   26,686
Goodwill 1,191   1,191   1,191
MidAmerican Funding, LLC | Natural Gas | Operating segments          
Segment Reporting [Line Items]          
Revenues 111 116 501 461  
Cost of sales 50 57 340 302  
Operations and maintenance 46 34 85 67  
Depreciation and amortization 18 17 36 34  
Property and other taxes 4 3 9 7  
Operating income (7) 5 31 51  
Interest expense (8) (7) (17) (15)  
Interest and dividend income 0 0 1 1  
Income tax expense (benefit) (3) 0 4 10  
Other segment items 8 5 5 6  
Net income (loss) attributable to parent (4) 3 16 33  
Capital expenditures 29 $ 25 53 $ 56  
Assets 2,181   2,181   2,224
Goodwill $ 79   $ 79   $ 79