Pension and Other Postretirement Benefit Plans (Plan assets) (Details) (Foreign Plan [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Expected future long-term rate of return on plan assets, percent	3.75%	4.25%
Swiss bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation, percentage	15.00%
Historical asset rates of return (percentage)	0.80%	0.40%
Non-Swiss hedged bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation, percentage	10.00%
Swiss equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation, percentage	10.00%
Historical asset rates of return (percentage)	4.10%	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 asset rates of return (percentage)	1.00%	1.00%
Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation, percentage	40.00%
Historical asset rates of return (percentage)	3.70%	4.80%
Unhedged Global Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Historical asset rates of return (percentage)	5.50%	6.50%
Emerging Market Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation, percentage	5.00%
Historical asset rates of return (percentage)	5.30%	7.40%
Alernative investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation, percentage	4.00%
Historical asset rates of return (percentage)	2.33%	2.80%
Cash and other short-term investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation, percentage	1.00%
Historical asset rates of return (percentage)	1.30%	1.40%