Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation of the Company (Details)

v2.4.0.6
Share-Based Compensation of the Company (Details) (USD $)
 12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2009
Dec. 31, 2011
Parent Company [Member]
Dec. 31, 2010
Parent Company [Member]
Dec. 31, 2009
Parent Company [Member]
Mar. 31, 2011
Member Four Exercise Price [Member]
Parent Company [Member]
Dec. 31, 2011
Member Four Exercise Price [Member]
Parent Company [Member]
Dec. 31, 2011
Notional Unit Threshold - 40% [Member]
Parent Company [Member]
Dec. 31, 2011
Notional Unit Threshold - 50% [Member]
Parent Company [Member]
Dec. 31, 2011
Notional Unit Threshold - 60% [Member]
Parent Company [Member]
Dec. 31, 2011
Notional Unit Threshold - 50% of Peer Group [Member]
Parent Company [Member]
Exercise Price of Options Granted During the Period         $ 26.06          
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized   $ 19,500,000                
Notional Units, Grants in Period     392,000              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized   15,400,000                
Total Options Granted, to Date, Net of Forfeitures   7,345,460                
Total Restricted Shares Granted, To Date, Net of Forfeitures   2,774,820                
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant   4,103,720                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures   191,500     191,500          
Severance Costs 3,400,000                  
Number of Restricted Shares Vested Upon Employee Retirement 432,000                  
Incremental Share Based Compensation       6,900,000            
Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount   234,000 393,000 302,000            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value   $ 652,000,000 $ 1,700,000 $ 1,500,000            
Share-based Payment Award, Options, Number of Years from Date of Grant Options Expire           10        
Share-based Payment Award, Options, Percentage of Options Becoming Exerciseable Each Year           20.00%        
Notional Units Conversion Ratio             1 2 3 1