v3.24.0.1
Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2023
Accounting Policies [Abstract]  
Schedule of Property Plant and Equipment
The service life ranges and weighted average remaining service life of PPE as at December 31 were as follows.
20232022
(years)
Service Life
Ranges
Weighted
Average
Remaining
Service Life		Service Life
Ranges		Weighted
Average
Remaining
Service Life
Distribution
Electric
5-80
31
5-80
31
Gas
18-95
38
18-95
39
Transmission
Electric
20-90
41
20-90
41
Gas
10-85
36
10-85
35
Generation
2-95
23
5-95
22
Other
3-80
10
3-80
11
($ millions)CostAccumulated DepreciationNet Book Value
2023
Distribution
Electric14,352 (3,708)10,644 
Gas6,682 (1,736)4,946 
Transmission
Electric19,886 (4,267)15,619 
Gas2,751 (843)1,908 
Generation7,192 (2,739)4,453 
Other4,444 (1,645)2,799 
Assets under construction2,581 — 2,581 
Land435 — 435 
58,323 (14,938)43,385 
2022
Distribution
Electric13,650 (3,715)9,935 
Gas6,396 (1,626)4,770 
Transmission
Electric19,056 (4,074)14,982 
Gas2,600 (800)1,800 
Generation7,173 (2,679)4,494 
Other4,803 (1,610)3,193 
Assets under construction2,094 — 2,094 
Land395 — 395 
56,167 (14,504)41,663 
Schedule of Intangible Assets
The service life ranges and weighted average remaining service life of finite-life intangible assets as at December 31 were as follows.
20232022
(years)Service Life
Ranges		Weighted
Average
Remaining
Service Life		Service Life
Ranges		Weighted
Average
Remaining
Service Life
Computer software
3-18
5
3-15
5
Land, transmission and water rights
30-90
52
34-90
53
Other
10-100
14
10-100
14
AccumulatedNet Book
($ millions)
CostAmortizationValue
2023
Computer software1,040 (528)512 
Land, transmission and water rights1,071 (182)889 
Other132 (81)51 
Assets under construction58 — 58 
2,301 (791)1,510 
2022
Computer software985 (497)488 
Land, transmission and water rights1,064 (171)893 
Other135 (78)57 
Assets under construction110 — 110 
2,294 (746)1,548