Shareholders' equity Shareholders' Equity (Tables)

6 Months Ended

Jun. 30, 2016

Shareholders' equity [Abstract]

Dividends Declared [Table Text Block]

The following table presents dividend distributions per Common Share in Swiss francs (CHF) and U.S. dollars (USD):

	Three Months Ended						Six Months Ended
	June 30						June 30
	2016			2015			2016			2015
	CHF	USD		CHF	USD		CHF	USD		CHF	USD
Dividends – par value reduction	—	$		—	$	—	—	$		0.62	$	0.65
Dividends – distributed from capital contribution reserves	0.68	0.69		0.62	0.67		1.34	1.36		0.62	0.67
Total dividend distributions per common share	0.68	$	0.69	0.62	$	0.67	1.34	$	1.36	1.24	$	1.32