Fair Value Measurements (Tables)

12 Months Ended

Nov. 30, 2012

Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]

Assets And Liabilities Measured At Fair Value On Recurring Basis

Our population of assets and liabilities subject to fair value measurements on a recurring basis at November 30, 2012 and 2011 are as follows:

			Fair value measurements using fair value hierarchy as of  November 30, 2012
(millions)	Fair value		Level 1		Level 2		Level 3
Assets
Cash and cash equivalents	$	79.0	$	79.0	—		—
Insurance contracts	72.5		—		$	72.5	—
Bonds and other long-term investments	13.6		13.6		—		—
Interest rate derivatives	16.7		—		16.7		—
Foreign currency derivatives	0.9		—		0.9		—
Total	$	182.7	$	92.6	$	90.1	—
Liabilities
Foreign currency derivatives	$	1.9	—		$	1.9	—
Interest rate derivatives	0.1		—		0.1		—
Total	$	2.0	—		$	2.0	—

			Fair value measurements using fair value hierarchy as of November 30, 2011
(millions)	Fair value		Level 1		Level 2		Level 3
Assets
Cash and cash equivalents	$	53.9	$	53.9	—		—
Insurance contracts	59.1		—		$	59.1	—
Bonds and other long-term investments	12.3		12.3		—		—
Interest rate derivatives	18.9		—		18.9		—
Foreign currency derivatives	2.7		—		2.7		—
Total	$	146.9	$	66.2	$	80.7	—
Liabilities
Foreign currency derivatives	$	0.4	—		$	0.4	—
Total	$	0.4	—		$	0.4	—