Taxation Taxation (Summary Of Income Tax Examinations) (Details)	12 Months Ended
	Dec. 31, 2021
Earliest Tax Year [Member] | Switzerland
Income Tax Examination [Line Items]
Open Tax Year	2016
Earliest Tax Year [Member] | AUSTRALIA
Income Tax Examination [Line Items]
Open Tax Year	2015
Earliest Tax Year [Member] | CANADA
Income Tax Examination [Line Items]
Open Tax Year	2012
Earliest Tax Year [Member] | FRANCE
Income Tax Examination [Line Items]
Open Tax Year	2019
Earliest Tax Year [Member] | GERMANY
Income Tax Examination [Line Items]
Open Tax Year	2015
Earliest Tax Year [Member] | ITALY
Income Tax Examination [Line Items]
Open Tax Year	2011
Earliest Tax Year [Member] | MEXICO
Income Tax Examination [Line Items]
Open Tax Year	2014
Earliest Tax Year [Member] | SPAIN
Income Tax Examination [Line Items]
Open Tax Year	2012
Earliest Tax Year [Member] | UNITED KINGDOM
Income Tax Examination [Line Items]
Open Tax Year	2015
Earliest Tax Year [Member] | UNITED STATES
Income Tax Examination [Line Items]
Open Tax Year	2014
Latest Tax Year [Member] | Switzerland
Income Tax Examination [Line Items]
Open Tax Year	2021
Latest Tax Year [Member] | AUSTRALIA
Income Tax Examination [Line Items]
Open Tax Year	2021
Latest Tax Year [Member] | CANADA
Income Tax Examination [Line Items]
Open Tax Year	2021
Latest Tax Year [Member] | FRANCE
Income Tax Examination [Line Items]
Open Tax Year	2021
Latest Tax Year [Member] | GERMANY
Income Tax Examination [Line Items]
Open Tax Year	2021
Latest Tax Year [Member] | ITALY
Income Tax Examination [Line Items]
Open Tax Year	2021
Latest Tax Year [Member] | MEXICO
Income Tax Examination [Line Items]
Open Tax Year	2021
Latest Tax Year [Member] | SPAIN
Income Tax Examination [Line Items]
Open Tax Year	2021
Latest Tax Year [Member] | UNITED KINGDOM
Income Tax Examination [Line Items]
Open Tax Year	2021
Latest Tax Year [Member] | UNITED STATES
Income Tax Examination [Line Items]
Open Tax Year	2021