v3.26.1
INVESTMENT IN SSAT (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Investments in affiliates          
Investment in SSAT $ 106.2   $ 106.2   $ 96.2
Operating lease right-of-use assets 373.0   373.0   369.6
Long-term operating lease liabilities 251.2   251.2   246.8
Financial information for equity method investment          
Current assets 536.0   536.0   471.9
Non-current assets 4,177.5   4,177.5   4,163.7
Total Assets 4,713.5   4,713.5   4,635.6
Current liabilities 603.8   603.8   527.4
Non-current liabilities 1,336.6   1,336.6   1,349.2
Total Liabilities and Shareholders' Equity 4,713.5   4,713.5   4,635.6
Company's share of income (loss) from SSAT 4.8 $ 7.3 9.8 $ 13.9  
Ocean Transportation          
Financial information for equity method investment          
Company's share of income (loss) from SSAT 4.8 7.3 9.8 13.9  
SSAT          
Investments in affiliates          
Investment in SSAT 106.2   106.2   $ 96.2
Financial information for equity method investment          
Operating revenue 294.1 307.7 576.8 619.2  
Operating costs and expenses (278.9) (294.6) (564.3) (592.1)  
Operating (loss) income 15.2 13.1 12.5 27.1  
Net Income (Loss) 20.9 18.7 24.9 36.4  
SSAT          
Financial information for equity method investment          
Company's share of income (loss) from SSAT $ 4.8 $ 7.3 $ 9.8 $ 13.9