Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Equity (Narrative) (Details)

v3.6.0.2
Equity (Narrative) (Details) - USD ($)
1 Months Ended 2 Months Ended 12 Months Ended
Mar. 31, 2017
Jun. 30, 2015
Mar. 15, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Feb. 28, 2017
Nov. 30, 2016
Aug. 31, 2016
May 31, 2016
Feb. 29, 2016
May 31, 2015
Feb. 28, 2015
Share Capital [Line Items]                          
Share repurchase program, authorized amount               $ 250,000,000 $ 250,000,000 $ 250,000,000 $ 400,000,000 $ 750,000,000 $ 250,000,000
Share repurchase program, authorized amount increase                       $ 500,000,000  
Approximate price per share       $ 38.62                  
Ordinary shares, acquired       25,012,978                  
Share cancellation, shares       15,563,862                  
AIG [Member]                          
Share Capital [Line Items]                          
Approximate price per share   $ 47.77                      
Total consideration for repurchase of common stock   $ 750,000,000                      
Stock repurchase program, expense       $ 11,200,000                  
Subsequent Event [Member]                          
Share Capital [Line Items]                          
Share repurchase program, authorized amount             $ 350,000,000            
Approximate price per share     $ 44.63                    
Ordinary shares, acquired     5,000,005                    
Share cancellation, shares 5,000,000                        
Ordinary Share Capital [Member]                          
Share Capital [Line Items]                          
Shares issued for acquisition           97,560,976              
Share cancellation, shares       15,563,862 9,698,588