Auction Rate Securities (Tables)

12 Months Ended

Oct. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Significant Assumptions Used to Determine Fair Value of Auction Rate Securities

Significant Assumptions used to Determine the Fair Values of our Auction Rate Securities

Assumption	October 31, 2014	October 31, 2013
Discount rates	L + 0.28% – L + 4.06%	L + 0.33% – L + 3.01%
Yields	2.15%, L + 2.00%	2.15%, L + 2.00%
Average expected lives	4 – 10 years	4 – 10 years

L - One Month LIBOR

Changes in Cost Basis and Fair Value of Auction Rate Securities

Changes in the Cost Basis and Fair Value of our Auction Rate Securities as of October 31, 2014 and 2013:

(in millions)	Amortized Cost Basis			Fair Value (Level 3)
Balance at November 1, 2012	$	18.0		$	17.8
Unrealized gains included in AOCL	—			0.2
Redemption of security by issuer	(5.0		)	(5.0		)
Balance at October 31, 2013	$	13.0		$	13.0
Balance at October 31, 2014	$	13.0		$	13.0