XML 67 R56.htm IDEA: XBRL DOCUMENT v3.10.0.1
Debt (Detail)
€ in Millions, $ in Millions
9 Months Ended
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Mar. 31, 2018
EUR (€)
INA Senior Note Due June 2019 [Member] | Senior Notes [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount   $ 500    
Debt Instrument, Interest Rate, Stated Percentage   5.90%    
Debt, Current   $ 499    
Chubb INA Senior Notes Due 2037 [Member] | Junior Subordinated Debt [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount   $ 1,000    
Debt Instrument, Interest Rate, Stated Percentage   6.375%    
Gain (Loss) on Extinguishment of Debt $ (36)      
Senior Notes [Member] | INA Senior Note Due March 2028 [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount     $ 1,100 € 900
Debt Instrument, Interest Rate, Stated Percentage     1.55% 1.55%
Make Whole Premium Additional Percent     0.15% 0.15%
Senior Notes [Member] | INA Senior Note Due March 2038 [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount     $ 1,100 € 900
Debt Instrument, Interest Rate, Stated Percentage     2.50% 2.50%
Make Whole Premium Additional Percent     0.25% 0.25%
Senior Notes [Member] | INA Senior Notes Due March 2018 [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount     $ 300  
Debt Instrument, Interest Rate, Stated Percentage     5.80% 5.80%
Senior Notes [Member] | INA Senior Note Due May 2018 [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount   $ 600    
Debt Instrument, Interest Rate, Stated Percentage   5.75%    
Senior Notes [Member] | INA Senior Note Due August 2018 [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount $ 100      
Debt Instrument, Interest Rate, Stated Percentage 6.60%