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CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - € / shares
Jan. 31, 2017
Oct. 31, 2016
Statement of Financial Position [Abstract]    
Common stock, shares issued (in shares) 145,133,567 145,074,042
Common stock, shares authorized (in shares) 500,000,000 500,000,000
Common stock, par value (in euros per share) € 0.01 € 0.01