Business Segment Information (Details 3) (USD $) In Thousands	Jul. 31, 2011	Oct. 31, 2010
Total assets by geographical area
Total assets	$ 4,003,892	$ 3,498,445
North America [Member]
Total assets by geographical area
Total assets	1,519,120	1,895,475
Europe Middle East and Africa [Member]
Total assets by geographical area
Total assets	1,573,068	1,012,131
Asia Pacific and Latin America [Member]
Total assets by geographical area
Total assets	$ 911,704	$ 590,839