Pension and Other Postretirement Benefit Plans (Plan assets) (Details) (Foreign Plan [Member])	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Expected future long-term rate of return on plan assets, percent	4.25%	4.25%
Swiss bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation, percentage	15.00%
Historical rate of return on plan assets, percent	0.40%	1.80%
Unhedged Foreign Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Historical rate of return on plan assets, percent		2.00%
Non-Swiss hedged bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation, percentage	13.00%
Swiss equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation, percentage	10.00%
Historical rate of return on plan assets, percent	5.60%	5.60%
Global equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation, percentage	15.00%
Hedged Foreign Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Historical rate of return on plan assets, percent	1.00%	1.50%
Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation, percentage	36.00%
Historical rate of return on plan assets, percent	4.80%	4.30%
Unhedged Global Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Historical rate of return on plan assets, percent	6.50%	6.90%
Emerging market equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation, percentage	6.00%
Historical rate of return on plan assets, percent	7.40%
Alernative investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation, percentage	3.00%
Historical rate of return on plan assets, percent	2.80%	4.60%
Cash and other short-term investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation, percentage	2.00%
Historical rate of return on plan assets, percent	1.40%	1.30%