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PROPERTY AND EQUIPMENT - SUMMARY (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) item | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Property and equipment |  |  |
Cost | $ 2,615.2 | $ 2,444.2 |
Accumulated depreciation of property and equipment | 1,248.6 | 1,278.5 |
Property and equipment, net | 1,366.6 | 1,165.7 |
Depreciation Expense | 80.5 | 86.7 | $ 86.0
Property and equipment subject to capital leases | 0.1 | 4.9 |
Capitalized interest | 18.7 | 7.5 | 2.1
Net of accumulated depreciation | 0.7 | 3.8 |
Amortization expenses | 0.5 | 1.5 | $ 1.2
Vessels |  |  |
Property and equipment |  |  |
Cost | 1,489.2 | 1,433.6 |
Accumulated depreciation of property and equipment | 847.1 | 893.2 |
Property and equipment, net | 642.1 | 540.4 |
Cost of completed vessel transferred from construction in progress | 233.0 |  |
Capitalized interest | $ 12.8 |  |
Number of vesels under agreements for contstruction | item | 4 |  |
Containers and equipment |  |  |
Property and equipment |  |  |
Cost | $ 513.6 | 543.0 |
Accumulated depreciation of property and equipment | 362.9 | 349.0 |
Property and equipment, net | 150.7 | 194.0 |
Terminal facilities and other property |  |  |
Property and equipment |  |  |
Cost | 66.0 | 64.8 |
Accumulated depreciation of property and equipment | 38.6 | 36.3 |
Property and equipment, net | 27.4 | 28.5 |
Vessel construction in progress |  |  |
Property and equipment |  |  |
Cost | 487.2 | 376.6 |
Property and equipment, net | 487.2 | 376.6 |
Capitalized interest | 16.3 | 10.4 |
Other construction in progress |  |  |
Property and equipment |  |  |
Cost | 59.2 | 26.2 |
Property and equipment, net | $ 59.2 | $ 26.2 |

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