XML 71 R54.htm IDEA: XBRL DOCUMENT v3.7.0.1
Fair Value Measurements (Narrative) (Details)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2017
USD ($)
$ / shares
shares
Mar. 31, 2016
USD ($)
Mar. 31, 2017
ZAR / shares
Jan. 31, 2017
ZAR / shares
Dec. 31, 2016
USD ($)
Jan. 31, 2016
ZAR / shares
Feb. 24, 2015
USD ($)
Dec. 31, 2014
ZAR / shares
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Adjustments to acquisition related contingent consideration liability $ (16)              
Increase in fair value of contingent consideration due to 5% increase in projections 22              
Decrease in fair value of contingent consideration due to 5% decrease in projections (22)              
Carrying value of investment 426       $ 389      
Unrealized investment gains (losses) $ (5) $ 0            
Minimum                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Revenue target period (in years) 2 years              
Maximum                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Revenue target period (in years) 4 years              
Private Equity Funds, Foreign                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Carrying value of investment $ 72       $ 79      
Alexander Forbes Group Holdings Limited                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Share price (Rand) | ZAR / shares     ZAR 6.43         ZAR 7.50
Carrying value of investment $ 289              
Percentage of ownership in equity investment 33.00%              
Investment shares owned | shares 443              
Market value of investment $ 229              
Alexander Forbes Group Holdings Limited | Minimum                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Share price (Rand) | ZAR / shares           ZAR 6.38    
Alexander Forbes Group Holdings Limited | Maximum                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Share price (Rand) | ZAR / shares       ZAR 7.89        
Mercer Consulting Group | Benefitfocus                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Market value of investment $ 79              
Percentage of business interest acquired             9.90%  
Total consideration             $ 75  
Money Market Funds                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Share price (Rand) | $ / shares $ 1.00