v2.4.0.8
Employee Benefits (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]        
Benefit cost $ 1 $ 1 $ 4 $ 3
Common stock shares reserved for future issuance 2.6   2.6  
Compensation expenses   1 2 2
Non-U.S. Benefit Plans [Member]
       
Defined Benefit Plan Disclosure [Line Items]        
Cost or expenses included in compensation and benefit expense 5 4 14 13
U.S. Defined Contribution Savings Plan [Member]
       
Defined Benefit Plan Disclosure [Line Items]        
Percentage of employer contributions     100.00%  
Percentage of eligible employee contributions receiving employer contributions     4.00%  
Defined contributions plan expense 2 1 4 4
Employer retirement contributions [Member]
       
Defined Benefit Plan Disclosure [Line Items]        
Defined contributions plan expense $ 3 $ 1 $ 4 $ 2
Share-based compensation [Member]
       
Defined Benefit Plan Disclosure [Line Items]        
Common stock shares reserved for future issuance 3.2   3.2  
Offering periods for ESPP shares, months     6  
Percentage of fair market value of common stock     85.00%  
Percentage of discount to employees on purchase of common stock under ESPP     15.00%