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2418406 - Disclosure - Pension Plans, Other Postretirement Benefits, and Defined-Contribution Plans - Components of Net Periodic Benefit Cost Table (Detail)
(http://www.anadarko.com/role/PensionPlansOtherPostretirementBenefitsAndDefinedContributionPlansComponentsOfNetPeriodicBenefitCostTableDetail)
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]
2016-01-01 - 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]
Pension Plans, Defined Benefit [Member]Other Postretirement Benefit Plan [Member]Pension Plans, Defined Benefit [Member]Other Postretirement Benefit Plan [Member]Pension Plans, Defined Benefit [Member]Other Postretirement Benefit Plan [Member]
Components of net periodic benefit cost
 
 
 
 
 
 
Service cost
99,000,000  
3,000,000  
118,000,000  
9,000,000  
99,000,000  
7,000,000  
Interest cost
95,000,000  
12,000,000  
101,000,000  
15,000,000  
99,000,000  
15,000,000  
Expected return on plan assets
(97,000,000) 
0  
(109,000,000) 
0  
(106,000,000) 
0  
Amortization of net actuarial loss (gain)
42,000,000  
0  
52,000,000  
0  
34,000,000  
(7,000,000) 
Amortization of net prior service cost (credit)
0  
(25,000,000) 
0  
(4,000,000) 
0  
0  
Settlement expense (1)
146,000,000 1
0 1
11,000,000  
0  
0  
0  
Termination benefits expense (1)
44,000,000 1
0 1
0  
0  
0  
0  
Curtailment expense (1)
8,000,000 1
0 1
0  
0  
0  
0  
Net periodic benefit cost
337,000,000  
 
(10,000,000) 
 
173,000,000  
 
20,000,000  
 
126,000,000  
 
15,000,000  
 
1: During 2016, settlement expenses, termination benefits expense, and curtailment expense primarily relate to the workforce reduction program initiated in the first quarter of 2016. See Note 17—Restructuring Charges.