CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)	Jun. 30, 2015 SFr / shares shares	Mar. 31, 2015 $ / shares shares
Statement of Financial Position [Abstract]
Shares, par value (in CHF per share) | (per share)	SFr 0.25	$ 0.25
Shares, issued	173,106,000	173,106,000
Shares, authorized	173,106,000	173,106,000
Shares, conditionally authorized	50,000,000	50,000,000
Treasury, at cost, shares	8,676,000	8,625,000