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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2025
Property, Plant and Equipment [Abstract]  
Schedule of major classes of property, plant and equipment by category
Presented in the table below are the major classes of property, plant and equipment by category as of December 31:
20252024Range of Remaining Useful LivesWeighted Average Useful Life
Utility plant:    
Land and other non-depreciable assets$317 $302   
Sources of supply1,252 1,124 
20 to 114 years
45 years
Treatment and pumping5,093 4,786 
2 to 119 years
40 years
Transmission and distribution15,807 14,745 
15 to 128 years
65 years
Services, meters and fire hydrants7,046 6,356 
2 to 109 years
28 years
General structures and equipment3,116 2,813 
2 to 109 years
16 years
Waste collection2,124 1,986 
5 to 145 years
52 years
Waste treatment, pumping and disposal1,530 1,425 
4 to 165 years
32 years
Construction work in progress1,548 1,359   
Other plant19 22 
1 to 54 years
18 years
Total utility plant37,852 34,918   
Nonutility property103 141 
3 to 50 years
16 years
Total property, plant and equipment$37,955 $35,059