Rendering

Component: (Network and Table)
Network
2414407 - Disclosure - Pension and other postretirement benefits - Net Periodic Benefit Cost (Details)
(http://www.centuryca.com/role/PensionAndOtherPostretirementBenefitsNetPeriodicBenefitCostDetails)
TableSchedule of Defined Benefit Plans Disclosures [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000949157 (http://www.sec.gov/CIK)
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]
Defined Benefit Pension Plans [Member]Other Postretirement Benefit Plans [Member]Defined Benefit Pension Plans [Member]Other Postretirement Benefit Plans [Member]Defined Benefit Pension Plans [Member]Other Postretirement Benefit Plans [Member]
Service cost
4,651,000  
1,003,000  
6,346,000  
1,970,000  
5,605,000  
1,591,000  
Interest cost
13,892,000  
5,595,000  
13,388,000  
5,985,000  
11,629,000  
6,420,000  
Expected return on plan assets
(18,774,000) 
0  
(21,241,000) 
0  
(14,694,000) 
0  
Amortization of prior service costs
106,000  
(2,781,000) 
110,000  
(3,728,000) 
77,000  
(3,844,000) 
Amortization of net loss
4,666,000  
3,537,000  
3,980,000  
3,814,000  
1,907,000  
3,704,000  
Settlements
0  
0  
0  
0  
4,701,000  
0  
Curtailment cost (benefit)
0  
0  
1,235,000  
(4,266,000) 
263,000  
0  
Net periodic benefit cost
4,541,000  
 
7,354,000  
 
3,818,000  
 
3,775,000  
 
9,488,000  
 
7,871,000