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Network
2418412 - Disclosure - Pension Plans, Other Postretirement Benefits, and Defined-Contribution Plans - Estimated Benefit Payments Table (Detail)
(http://www.anadarko.com/role/PensionPlansOtherPostretirementBenefitsAndDefinedContributionPlansEstimatedBenefitPaymentsTableDetail)
TableSchedule of Defined Benefit Plans Disclosures [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000773910 (http://www.sec.gov/CIK)
Defined Benefit Plan Disclosure [Line Items]Period [Axis]
2016-12-31
Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]
Pension Plans, Defined Benefit [Member]Other Postretirement Benefit Plan [Member]
2017
302,000,000  
24,000,000  
2018
147,000,000  
20,000,000  
2019
166,000,000  
20,000,000  
2020
164,000,000  
20,000,000  
2021
171,000,000  
19,000,000  
2022-2026
1,009,000,000  
93,000,000