Share Data (Details Textual) (USD $) In Millions, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Share Data (Textual) [Abstract]
Remaining shares available under authorized share repurchase program	6.8
Shares repurchased under authorization	0
Additional conditionally authorizable shares without additional shareholder approval	133.1
Payment of dividend funded from capital contribution	0.52
Number of installments by which the instalments of dividends paid	4
Total cash payments	66
Increase in current liabilities	133
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options excluded from the diluted net income per share	1.2	0.7