XML 27 R52.htm IDEA: XBRL DOCUMENT v3.2.0.727
Fair Value Measurements (Narrative) (Details)
shares in Millions, $ in Millions
6 Months Ended
Jun. 30, 2015
USD ($)
shares
Jun. 30, 2015
ZAR / shares
Dec. 31, 2014
USD ($)
Feb. 24, 2014
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Adjustments to acquisition related contingent consideration liability $ 21      
Increase in fair value of contingent consideration due to 5% increase in projections 23      
Decrease in fair value of contingent consideration due to 5% decrease in projections 31      
Carrying value of investment $ 424   $ 388  
Minimum [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Revenue target period (in years) 2 years      
Maximum [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Revenue target period (in years) 4 years      
Private Equity Funds, Foreign [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Carrying value of investment $ 77   $ 61  
Alexander Forbes Group Holdings Limited [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Carrying value of investment $ 301      
Investment shares owned | shares 443      
Share price | ZAR / shares   ZAR 9.00    
Market value of investment $ 324      
Mercer Consulting Group [Member] | Alexander Forbes Group Holdings Limited [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Percentage of ownership in equity investment     34.00%  
Mercer Consulting Group [Member] | Benefitfocus [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Market value of investment $ 124      
Percentage of business interest acquired       9.90%
Total Consideration       $ 75