Rendering

Component: (Network and Table)
Network
2417402 - Disclosure - Pension and Other Postretirement Benefit Plans - Components of Net Periodic Benefit Cost (Detail)
(http://www.merck.com/role/PensionAndOtherPostretirementBenefitPlansComponentsOfNetPeriodicBenefitCostDetail)
TableSchedule of Defined Benefit Plans Disclosures [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000310158 (http://www.sec.gov/CIK)
Defined Benefit Plan Disclosure [Line Items]Period [Axis]
2013-01-01 - 2013-12-31
2012-01-01 - 2012-12-31
2011-01-01 - 2011-12-31
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 Plan, Defined Benefit [Member]Other Postretirement Benefit Plan, Defined Benefit [Member]Pension Plan, Defined Benefit [Member]Other Postretirement Benefit Plan, Defined Benefit [Member]Pension Plan, Defined Benefit [Member]Other Postretirement Benefit Plan, Defined Benefit [Member]
Service cost
682,000,000  
102,000,000  
555,000,000  
82,000,000  
619,000,000  
110,000,000  
Interest cost
665,000,000  
107,000,000  
661,000,000  
121,000,000  
718,000,000  
141,000,000  
Expected return on plan assets
(1,097,000,000) 
(126,000,000) 
(970,000,000) 
(136,000,000) 
(972,000,000) 
(142,000,000) 
Net amortization
336,000,000  
(50,000,000) 
185,000,000  
(35,000,000) 
201,000,000  
(17,000,000) 
Termination benefits
58,000,000  
50,000,000  
27,000,000  
18,000,000  
59,000,000  
29,000,000  
Curtailments
(23,000,000) 
(11,000,000) 
(10,000,000) 
(7,000,000) 
(86,000,000) 
1,000,000  
Settlements
23,000,000  
0  
18,000,000  
0  
4,000,000  
0  
Net periodic benefit cost
644,000,000  
 
72,000,000  
 
466,000,000  
 
43,000,000  
 
543,000,000  
 
122,000,000