Rendering

Component: (Network and Table)
Network
2415402 - Disclosure - Retirement Benefits (Reconciliation Of The Benefit Obligation) (Details)
(http://www.antheminc.com/role/RetirementBenefitsReconciliationOfBenefitObligationDetails)
TableSchedule of Defined Benefit Plans Disclosures [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001156039 (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 Disclosures, Defined Benefit Plans [Axis]Defined Benefit Plans Disclosures, Defined Benefit Plans [Axis]Defined Benefit Plans Disclosures, Defined Benefit Plans [Axis]
Pension Benefits [Member]Other Benefits [Member]Pension Benefits [Member]Other Benefits [Member]Pension Benefits [Member]Other Benefits [Member]
Reconciliation of benefit obligation
 
 
 
 
 
 
Benefit obligation at beginning of year
1,833,300,000  
578,700,000  
1,914,400,000  
646,600,000  
  
Service cost
11,600,000  
1,600,000  
13,100,000  
2,100,000  
13,000,000  
3,200,000  
Interest cost
68,500,000  
22,400,000  
68,200,000  
23,400,000  
74,100,000  
26,300,000  
Plan amendments
0  
0  
800,000  
0  
  
Actuarial loss (gain)
32,200,000  
(4,200,000) 
(41,200,000) 
(58,100,000) 
  
Benefits paid
(120,700,000) 
(33,300,000) 
(122,000,000) 
(35,300,000) 
  
Benefit obligation at end of year
1,824,900,000  
 
565,200,000  
 
1,833,300,000  
 
578,700,000  
 
1,914,400,000  
 
646,600,000