MARKETABLE SECURITIES (Details) - USD ($) $ in Millions	12 Months Ended
Oct. 31, 2015	Oct. 31, 2014
Amortized cost and fair value of marketable securities
Amortized Cost	$ 423.0	$ 1,198.0
Gross Unrealized Gains	17.0	22.0
Gross Unrealized Losses	3.0	5.0
Fair Value	437.4	1,215.1
Equity Fund
Amortized cost and fair value of marketable securities
Amortized Cost	38.0	39.0
Gross Unrealized Gains	5.0	6.0
Fair Value	43.0	45.0
Fixed Income Funds
Amortized cost and fair value of marketable securities
Amortized Cost		10.0
Fair Value		10.0
U.S. Government Debt Securities
Amortized cost and fair value of marketable securities
Amortized Cost	79.0	806.0
Gross Unrealized Gains	3.0	3.0
Gross Unrealized Losses		1.0
Fair Value	82.0	808.0
Municipal Debt Securities
Amortized cost and fair value of marketable securities
Amortized Cost	29.0	31.0
Gross Unrealized Gains	2.0	3.0
Fair Value	31.0	34.0
Corporate Debt Securities
Amortized cost and fair value of marketable securities
Amortized Cost	121.0	167.0
Gross Unrealized Gains	4.0	7.0
Gross Unrealized Losses	1.0	2.0
Fair Value	124.0	172.0
International Debt Securities
Amortized cost and fair value of marketable securities
Amortized Cost	48.0
Gross Unrealized Losses	1.0
Fair Value	47.0
Mortgage-Backed Securities
Amortized cost and fair value of marketable securities
Amortized Cost	108.0	145.0
Gross Unrealized Gains	3.0	3.0
Gross Unrealized Losses	1.0	2.0
Fair Value	$ 110.0	$ 146.0

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 320
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