Quarterly report pursuant to Section 13 or 15(d)

Multi-Employer and Defined Benefit Pension Plans (Details)

v3.19.1
Multi-Employer and Defined Benefit Pension Plans (Details)
$ in Millions
Sep. 30, 2018
USD ($)
Withdrawal from Multiemployer Defined Benefit Plan | American Maritime Officers Pension Plan  
Defined Benefit Plan Disclosure [Line Items]  
Pension and other postretirement benefit plans, withdrawal liability $ 28.1