MARKETABLE SECURITIES (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2013		Oct. 31, 2012
Amortized cost and fair value of marketable securities
Amortized Cost	$ 1,617		$ 1,445
Gross Unrealized Gains	17		26
Gross Unrealized Losses	9		1
Fair Value, Debt Securities	1,624.8		1,470.4
Equity Fund
Amortized cost and fair value of marketable securities
Amortized Cost	18
Gross Unrealized Gains	2
Fair Value, Debt Securities	20.0
U.S. Government Debt Securities
Amortized cost and fair value of marketable securities
Amortized Cost	1,309		1,193
Gross Unrealized Gains	5		7
Gross Unrealized Losses	2
Fair Value, Debt Securities	1,312.0		1,200.0
Municipal Debt Securities
Amortized cost and fair value of marketable securities
Amortized Cost	34		35
Gross Unrealized Gains	2		3
Fair Value, Debt Securities	36.0		38.0
Corporate Debt Securities
Amortized cost and fair value of marketable securities
Amortized Cost	135		100
Gross Unrealized Gains	6		10
Gross Unrealized Losses	3
Fair Value, Debt Securities	138.0		110.0
Mortgage-backed Securities
Amortized cost and fair value of marketable securities
Amortized Cost	121	[1]	117	[1]
Gross Unrealized Gains	2	[1]	6	[1]
Gross Unrealized Losses	4	[1]	1	[1]
Fair Value, Debt Securities	$ 119.0	[1]	$ 122.0	[1]

[1] Primarily issued by U.S. government sponsored enterprises.