Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2019
Property, Plant and Equipment [Abstract]  
Summary 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:
 
2019
 
2018
 
Range of Remaining Useful Lives
 
Weighted Average Useful Life
Utility plant:
 
 
 
 
 
 
 
Land and other non-depreciable assets
$
166

 
$
155

 
 
 
 
Sources of supply
858

 
821

 
 2 to 127 Years
 
47 years
Treatment and pumping facilities
3,750

 
3,607

 
 3 to 101 Years
 
41 years
Transmission and distribution facilities
10,807

 
10,164

 
 9 to 149 Years
 
70 years
Services, meters and fire hydrants
4,304

 
4,008

 
 5 to 90 Years
 
31 years
General structures and equipment
1,748

 
1,625

 
1 to 109 Years
 
16 years
Waste collection
1,153

 
943

 
5 to 114 Years
 
59 years
Waste treatment, pumping and disposal
720

 
570

 
3 to 139 Years
 
45 years
Construction work in progress
801

 
593

 
 
 
 
Less: Utility plant included in assets held for sale (a)
(587
)
 
—

 
 
 
 
Total utility plant
23,720

 
22,486

 
 
 
 
Nonutility property
226

 
718

 
3 to 50 Years
 
6 years
Less: Nonutility plant included in assets held for sale (a)
(5
)
 
—

 
 
 
 
Total property, plant and equipment
$
23,941

 
$
23,204

 
 
 
 

(a)
This property, plant and equipment is related to the pending transactions contemplated by the Stock Purchase Agreement and is included in assets held for sale on the Consolidated Balance Sheets. See Note 4—Acquisitions and Divestitures for additional information.