v3.26.1
Postretirement benefits (Tables)
6 Months Ended
Jun. 30, 2026
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Components of net periodic benefit income
Postretirement benefit income is included in other income, net on the consolidated statements of comprehensive income and consisted of the following components:
Quarter Ended
June 30,
Six Months Ended
June 30,
(in millions)2026202520262025
Expected return on plan assets$2.4 $2.1 $4.9 $4.3 
Amortization of prior service credit0.4 0.4 0.7 0.7 
Interest cost(0.3)(0.4)(0.6)(0.8)
Amortization of net actuarial losses— (0.2)(0.1)(0.4)
Net periodic benefit income$2.5 $1.9 $4.9 $3.8