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Component: (Network and Table)
Network
2416410 - Disclosure - Pension And Other Postretirement Benefits (Schedule Of Expected Payments To Participants In Pension Plan) (Details)
(http://www.columbiapipelinepartners.com/role/PensionAndOtherPostretirementBenefitsScheduleOfExpectedPaymentsToParticipantsInPensionPlanDetails)
TableSchedule of Defined Benefit Plans Disclosures [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001420783 (http://www.sec.gov/CIK)
Period [Axis]2015-12-31
Defined Benefit Plan Disclosure [Line Items]Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]
Pension Plan [Member]Other Postretirement Benefit Plan [Member]Postretirement Health Coverage [Member]
2016
27,200,000  
6,200,000  
300,000  
2017
27,100,000  
6,200,000  
300,000  
2018
27,900,000  
6,300,000  
300,000  
2019
28,000,000  
6,400,000  
300,000  
2020
30,000,000  
6,400,000  
300,000  
2021-2025
145,800,000  
31,400,000  
1,200,000