XML 49 R111.htm IDEA: XBRL DOCUMENT v2.4.0.6
Share-based Compensation Plans (Performance Share Awards) (Details)
In Millions, except Share data, unless otherwise specified
12 Months Ended 12 Months Ended
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Dec. 31, 2010
USD ($)
Dec. 31, 2012
EBT
Ordinary Shares
Dec. 31, 2012
EBT
ADS
Dec. 31, 2012
Performance Share Awards
GBP (£)
Performance Share Awards Outstanding [Roll Forward]            
Outstanding as at beginning of period           5,709,744 [1]
Granted           1,485,169 [1]
Exercised           (3,136,714) [1]
Forfeited           (540,061) [1]
Outstanding as at end of period           3,518,138 [1]
Aggregate intrinsic value           £ 66.4
Weighted average remaining life           5 years 4 months
Weighted average grant date fair value (per share)           £ 21.56
Intrinsic values of share-based awards exercised 224.1 189.3 70.3      
Cash received from employees as a result of employee share option exercises 16.2 13.4 11.2      
Tax benefit associated with exercise of stock options $ 40.1 $ 29.4 $ 2.9      
Treasury Stock            
Treasury stock held (in shares)       3,800,000 1,100,000  
[1] Number of awards are stated in terms of ordinary share equivalents