v3.26.1
Financial Instruments and Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 2026
Fair Value Disclosures [Abstract]  
Summary Of Carrying Values And Fair Values Of Fixed Rate Debt A summary of the aggregate carrying values and fair values of our senior unsecured notes is as follows:
June 30,
2026		December 31,
2025
Carrying value$3,428.1 $3,425.6 
Fair value$3,326.2 $3,357.7 
Gains (losses) recognized related to equity investments
Six Months Ended June 30,
20262025
Net gains (losses) recognized during the period on equity securities
$54.0 $(9.8)
Less: Net gains recognized during the period on equity securities sold/exchanged during the period
1.5 — 
Unrealized gains (losses) recognized during the reporting period on equity securities still held at the reporting date
$52.5 $(9.8)
Nonfinancial Assets Measured and Recorded At Fair Value On A Nonrecurring Basis
The following table presents nonfinancial assets measured and recorded at fair value on a nonrecurring basis during the six months ended June 30, 2026 and 2025:
20262025
DescriptionFair Value
Measurements Using Significant
Unobservable Inputs
(Level 3)		Gain/(Loss)Fair Value
Measurements Using Significant
Unobservable Inputs
(Level 3)		Gain/(Loss)
Goodwill
$— $— $75.2 $(65.3)
Franchise rights
$— $— $42.7 $(71.7)
Long-lived assets held and used$11.9 $(9.3)$13.5 $(3.2)
Long-lived assets held for sale
$— $— $30.4 $(2.4)
Fair Value Measurement Inputs and Valuation Techniques
Quantitative Information about Level 3 Fair Value Measurements
DescriptionFair Value at April 30, 2025Valuation TechniqueUnobservable InputRange (Average)
Franchise rights$42.7 Discounted cash flowWeighted average cost of capital
8.9% - 9.1% (9.0%)
Discount rate
9.6% - 11.3% (10.4%)
Long-term revenue growth rate
2.0%
Long-term pretax margin
0.0% - 5.9% (2.4%)
Contributory asset charges
5.1% - 8.4% (6.2%)