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Component: (Network and Table)
Network
2416411 - Disclosure - Pension And Other Postretirement Benefits (Components Of The Plans' Net Periodic Benefits Cost) (Details)
(http://www.cpg.com/role/PensionAndOtherPostretirementBenefitsComponentsOfPlansNetPeriodicBenefitsCostDetails)
TableSchedule of Defined Benefit Plans Disclosures [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001667154 (http://www.sec.gov/CIK)
Defined Benefit Plan Disclosure [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Scenario [Axis]Scenario [Axis]Scenario [Axis]
Scenario, Unspecified [Domain]Scenario, Unspecified [Domain]PredecessorScenario, Unspecified [Domain]
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Axis]Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Axis]Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Axis]Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Axis]
Pension Plan [Member]Other Postretirement Benefits [Member]Pension Plan [Member]Other Postretirement Benefits [Member]Pension Plan [Member]Other Postretirement Benefits [Member]Pension Plan [Member]
Service Cost
5,300,000  
800,000  
5,300,000  
1,000,000  
4,800,000  
1,100,000  
 
Interest cost
12,300,000  
3,800,000  
12,500,000  
4,000,000  
13,700,000  
4,600,000  
 
Expected return on assets
(20,600,000) 
(14,200,000) 
(23,600,000) 
(17,400,000) 
(23,800,000) 
(16,500,000) 
 
Amortization of transition obligation
       
Amortization of prior service cost
(900,000) 
100,000  
(900,000) 
100,000  
(1,000,000) 
100,000  
 
Recognized actuarial loss
9,900,000  
300,000  
8,200,000  
(200,000) 
6,600,000  
(100,000) 
 
Net Periodic Benefit Costs
6,000,000  
 
(9,200,000) 
 
1,500,000  
 
(12,500,000) 
 
300,000  
 
(10,800,000) 
 
 
 
Settlement Loss
7,500,000  
0  
0  
0  
  
0  
Total Net Periodic Benefits Cost
13,500,000  
 
(9,200,000) 
 
1,500,000  
 
(12,500,000) 
 
300,000  
 
(10,800,000)