SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2017

Schedule of changes in the allowance for doubtful accounts receivable

Changes in the allowance for doubtful accounts receivable for the three years ended December 31, 2017 were as follows:

	Balance at		Expense		Write-offs		Balance at
Year (in millions)	Beginning of Year		(Recovery) (1)		and Other		End of Year
2017	$	4.2	$	1.0	$	(0.6)	$	4.6
2016	$	6.6	$	(0.3)	$	(2.1)	$	4.2
2015	$	5.0	$	2.0	$	(0.4)	$	6.6

(1) Expense is shown net of amounts recovered from previously reserved doubtful accounts.

Schedule of prepaid expenses and other assets

Prepaid expenses and other assets consist of the following at December 31, 2017 and 2016:

	As of December 31,
Prepaid Expenses and Other Assets (in millions)	2017		2016
Income tax receivables	$	2.6	$	23.4
Insurance related receivables		15.2		17.6
Prepaid fuel		14.4		11.5
Other		19.4		18.3
Total	$	51.6	$	70.8

Schedule of other long-term assets

Other long-term assets consist of the following at December 31, 2017 and 2016:

	As of December 31,
Other Long-Term Assets (in millions)	2017		2016
Alternative minimum tax (AMT) receivable (1)	$	50.2	$	—
Deferred charges and other		20.7		17.7
Vessel and equipment spare parts		12.7		11.4
Capital construction fund - cash on deposit (See Note 7)		0.9		31.2
Total	$	84.5	$	60.3

Represents AMT tax credits refundable as a result of the Tax Act.

Schedule of estimated useful lives of property and equipment

Classification	Life
Vessels	40 years
Machinery and equipment	30 years
Terminal facilities	35 years

Schedule of accrued and other liabilities

Accruals and other liabilities consist of the following at December 31, 2017 and 2016:

	As of December 31,
Accruals and Other Liabilities (in millions)	2017		2016
Payroll and vacation related accruals	$	24.7	$	23.3
Uninsured claims and related liabilities - short term		15.4		18.4
Employee incentives and other related accruals		17.4		8.7
Interest on debt		5.4		5.8
Multi-employer withdrawal liability - short term (see Note 12)		4.1		4.1
Deferred revenues		5.0		2.9
Pension and post-retirement liabilities - short term (see Note 11)		3.0		2.1
Other liabilities		5.4		10.0
Total	$	80.4	$	75.3

Schedule of other long-term liabilities

Other long-term liabilities consist of the following at December 31, 2017 and 2016:

	As of December 31,
Other Long-term Liabilities (in millions)	2017		2016
Pension and post-retirement liabilities (see Note 11)	$	75.1	$	75.0
Multi-employer withdrawal liability (see Note 12)		58.4		60.1
Uninsured claims and related liabilities		29.5		27.4
Other long-term liabilities		8.5		9.6
Total	$	171.5	$	172.1

Ocean Transportation

Schedule of principal revenue generating activities by segment

	Year Ended December 31,
Ocean Transportation (in millions) (1)	2017		2016		2015
Ocean transportation services	$	1,531.8	$	1,504.5	$	1,472.0
Terminal and other related services		23.5		22.9		15.9
Fuel sales		9.9		7.5		10.1
Ship management services		6.6		6.2		—
Total	$	1,571.8	$	1,541.1	$	1,498.0

(1) Ocean transportation revenue transactions are primarily denominated in U.S. dollars except for approximately 3 percent of ocean transportation revenues and fuel sales which are denominated in foreign currencies. 

Logistics

Schedule of principal revenue generating activities by segment

	Year Ended December 31,
Logistics (in millions) (1)	2017		2016		2015
Transportation brokerage and freight forwarding services	$	445.1	$	373.7	$	360.7
Warehouse and distribution services		17.5		19.7		19.8
Supply chain management and other services		12.5		7.1		6.4
Total	$	475.1	$	400.5	$	386.9

(1) Logistics revenue transactions are primarily dominated in U.S. dollars except for approximately 3 percent of transportation brokerage and freight forwarding services revenue, and supply chain management and other services revenue categories are denominated in foreign currencies.