v3.26.3
CONDESNED BALANCE SHEETS PARENTHETICAL - USD ($)
shares in Millions, $ in Millions
Sep. 30, 2026
Dec. 31, 2025
Sep. 30, 2025
Assets      
Accumulated depreciation $ 5,643.6 $ 5,508.7 $ 5,487.7
Shareholders' equity:      
Common stock, par value $ 1.00 $ 1.00 $ 1.00
Common stock, authorized (in shares) 240.0 240.0 240.0
Common stock, issued 114.0 113.6 114.1
Common stock, outstanding 114.0 113.6 114.1