Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Apr. 30, 2013	Oct. 31, 2012
Common Stock, Par or Stated Value Per Share	$ 0.10	$ 0.10
Common Stock, Shares Authorized	220	220
Common Stock, Shares, Issued	86.8	86.0
Treasury Stock, Shares	6.4	6.8
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 2,386	$ 2,228
Finite-Lived Intangible Assets, Accumulated Amortization	$ 89	$ 78