XML 131 R111.htm IDEA: XBRL DOCUMENT v3.3.1.900
Share-based Compensation Plans (Performance Share Awards) (Details)
£ / shares in Units, £ in Millions, $ in Millions
12 Months Ended
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2015
USD ($)
£ / shares
shares
Dec. 31, 2014
USD ($)
shares
Dec. 31, 2014
USD ($)
£ / shares
Dec. 31, 2013
USD ($)
Dec. 31, 2013
USD ($)
£ / shares
Dec. 31, 2015
GBP (£)
shares
Performance Share Awards Outstanding [Roll Forward]              
Weighted average remaining life 5 years 4 months 24 days            
Tax benefit associated with exercise of stock options (in US dollar) | $ $ 31.6   $ 39.6   $ 11.9    
Intrinsic values of share-based awards exercised (in US dollar) | $ 198.8 $ 198.8 200.8 $ 200.8 298.3 $ 298.3  
Cash received from employees as a result of employee share option exercises (in US dollar) | $ $ 16.6   $ 17.4   $ 17.2    
EBT | Ordinary Shares              
Equity, Class of Treasury Stock [Line Items]              
Treasury stock held (in shares) 600,000 600,000         600,000
EBT | ADS              
Equity, Class of Treasury Stock [Line Items]              
Treasury stock held (in shares) 200,000 200,000         200,000
RSUs.PSUs and PSAs              
Performance Share Awards Outstanding [Roll Forward]              
Outstanding as at beginning of period [1] 2,166,181            
Granted [1] 1,075,254            
Exercised [1] (975,895)            
Forfeited [1] (473,610)            
Outstanding as at end of period [1] 1,791,930   2,166,181        
Aggregate intrinsic value (in GBP) | £             £ 84.2
Weighted average grant date fair value (in GBP per share) | £ / shares   $ 53.11   $ 35.11   $ 19.71  
[1] Number of awards are stated in terms of ordinary share equivalents