Fair Value Measurements (Tables)

9 Months Ended

Aug. 31, 2012

Fair Value Disclosures [Abstract]

Assets and liabilities measured at fair value on recurring basis

Our population of financial assets and liabilities subject to fair value measurements on a recurring basis are as follows (in millions):

			Fair value measurements using fair value hierarchy As of
			August 31, 2012
	Fair Value		Level 1		Level 2		Level 3
Assets
Cash and cash equivalents	$	72.2	$	72.2	$	—	$	—
Insurance contracts	71.1		—		71.1		—
Bonds & other long-term investments	12.9		12.9		—		—
Interest rate derivatives	16.6		—		16.6		—
Foreign currency derivatives	0.7		—		0.7		—
Total	$	173.5	$	85.1	$	88.4	$	—
Liabilities
Foreign currency derivatives	$	1.6	$	—	$	1.6	$	—

			Fair value measurements using fair value hierarchy As of
			August 31, 2011
	Fair Value		Level 1		Level 2		Level 3
Assets
Cash and cash equivalents	$	52.2	$	52.2	$	—	$	—
Insurance contracts	59.3		—		59.3		—
Bonds & other long-term investments	12.9		12.9		—		—
Interest rate derivatives	18.9		—		18.9		—
Foreign currency derivatives	1.9		—		1.9		—
Total	$	145.2	$	65.1	$	80.1	$	—
Liabilities
Foreign currency derivatives	$	2.9	$	—	$	2.9	—

			Fair value measurements using fair value hierarchy As of
			November 30, 2011
	Fair Value		Level 1		Level 2		Level 3
Assets
Cash and cash equivalents	$	53.9	$	53.9	$	—	$	—
Insurance contracts	59.1		—		59.1		—
Bonds & 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	$	—