Rendering

Component: (Network and Table)
Network
101320 - Disclosure - Pension Benefits and Savings Plans - Schedule of Change in Projected Benefit Obligation (Detail)
(http://www.argolimited.com/20161231/taxonomy/role/DisclosurePensionBenefitsAndSavingsPlansScheduleOfChangeInProjectedBenefitObligationDetail)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001091748 (http://www.sec.gov/CIK)
Compensation And Retirement Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
Compensation And Retirement Disclosure [Abstract]
 
 
Projected benefit obligation at beginning of year
23,100,000  
25,800,000  
Interest cost
800,000  
800,000  
Actuarial loss (gain)
400,000  
(1,600,000) 
Settlements and benefits paid
(1,700,000) 
(1,900,000) 
Projected benefit obligation at end of year
22,600,000  
 
23,100,000