Shareholders' Equity (Details)
In Millions, except Share data, unless otherwise specified |
1 Months Ended | 3 Months Ended | ||||||
---|---|---|---|---|---|---|---|---|
Jan. 31, 2012
USD ($)
|
Aug. 31, 2011
USD ($)
|
Nov. 30, 2010
USD ($)
|
Mar. 31, 2012
USD ($)
|
Mar. 31, 2012
CHF
|
Mar. 31, 2011
USD ($)
|
Mar. 31, 2011
CHF
|
Dec. 31, 2011
|
|
Shareholders' Equity [Abstract] | ||||||||
Per Common Share increase dividend installments | $ 0.12 | |||||||
Dividends declared per common share | $ 0.47 | 0.42 | $ 0.33 | 0.30 | ||||
Common shares in treasury, shares | 4,179,030 | 4,179,030 | 5,905,136 | |||||
Stock repurchase program, authorized amount | $ 303 | $ 600 | ||||||
Repurchase of outstanding common shares, shares | 100,000 | 100,000 | ||||||
Transaction cost | 7.0 | |||||||
Share repurchase authorization remains | $ 197 | $ 461 |