Share-Based Awards (Details - Other Awards) (CHF) Share data in Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
[EmployeeSharePurchasePlanMember]
Employee Share Purchase Plans [Line Items]
Length of offering period, in months	0 years 12 months 0 days
Number of purchase periods allowed under the plan	2
Length of purchase periods, in months	0 years 6 months 0 days
Contribution range low	1.00%
Contribution range high	10.00%
Discount on fair value	15.00%
Number of shares allocated to plan	0.6
Shares remaining for issuance	0.3
[SwissSharePurchasePlanMember]
Employee Share Purchase Plans [Line Items]
Number of purchase periods allowed under the plan	2
Length of purchase periods, in months	0 years 6 months 0 days
Contribution range low	1.00%
Contribution range high	8.00%
Contribution limit maximum, in CHF	5,000
Discount on fair value	40.00%
Restriction on transfer, in years	2 years 0 months 0 days
Number of shares allocated to plan	0.4
Shares remaining for issuance	0.2
Minimum Working Hours To Qualify	20
[ShareOptionsAndShareSettledShareAppreciationRightsMember]
Employee Share Purchase Plans [Line Items]
Shares remaining for issuance	3.0
[DirectorMember]
Non-employee directors stock plan [Line Items]
Number of share-based awards authorized	1.2
Number of share-based awards available for issuance	0.4
[DirectorMember] | [RestrictedShareUnitsMember]
Non-employee directors stock plan [Line Items]
Number of share-based awards authorized	0.8
Number of share-based awards available for issuance	0.1
Non Employee Share Based Transaction Award Percentage Restricted Stock Units Elected	60.00%
Non Employee Share Based Transaction Award Percentage Cash Elected In Lieu Of Restricted Stock Units	40.00%
[DirectorMember] | [ShareOptionsAndShareSettledShareAppreciationRightsMember]
Non-employee directors stock plan [Line Items]
Number of share-based awards authorized	0.4
Number of share-based awards available for issuance	0.3
Contractual term, in years	10 years 0 months 0 days
[DirectorMember] | [RsuGrantedPriorToMay2010Member]
Non-employee directors stock plan [Line Items]
Vesting period, in years	0 years 0 months 0 days
Delivery date restrictions, in years	1 year 0 months 0 days
[DirectorMember] | [RsuGrantedPostMay2010Member]
Non-employee directors stock plan [Line Items]
Vesting period, in years	5 years 0 months 0 days
Delivery date restrictions, in years	0 years 0 months 0 days