Financing Arrangements (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
		Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2013
Debt Instrument [Line Items]
Net proceeds from issuance of notes		$ 247.0	$ 0.0	$ 246.2
Rental expense under operating leases		39.0	40.3	$ 37.6
Guarantees outstanding		0.5
Letter Of Credit [Member]
Debt Instrument [Line Items]
Total unused capacity		12.4
Outstanding letters of credit		8.6	8.1
3.25% Notes Due 2025 [Member]
Debt Instrument [Line Items]
Notes outstanding	[1]	$ 250.0
Stated Note interest rate		3.25%
Net proceeds from issuance of notes		$ 246.5
Notes subject to interest rate hedge	[1]	$ 100.0
Notes Payable, Other Payables [Member] | 3.25% Notes Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, effective interest rate		1.58%
Notes outstanding	[1]	$ 250.0
Stated Note interest rate	[2]	3.25%
Debt instrument maturity year	[2]	2025
Debt, Weighted Average Interest Rate		3.45%
Notes Payable, Other Payables [Member] | 5.20% Notes Due 2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, effective interest rate		0.29%
Notes outstanding	[3]	$ 200.0	$ 200.0
Stated Note interest rate		5.20%	5.20%
Debt instrument maturity year		2015	2015
Notes Payable, Other Payables [Member] | August 2013 [Member]
Debt Instrument [Line Items]
Notes outstanding		$ 250.0
Debt, Weighted Average Interest Rate		3.30%
Line of Credit [Member]
Debt Instrument [Line Items]
Credit facility		$ 642.5
Line of Credit Facility, Maximum Borrowing Capacity		154.0
Total unused capacity		122.0
Committed credit facilities, fee		0.5	$ 0.5
Line of Credit [Member] | Current Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility		$ 750.0	$ 600.0
Basis spread on variable rate		0.75%
Commercial Paper Program [Member]
Debt Instrument [Line Items]
Credit facility		$ 107.5
Interest Rate Swap [Member] | Notes Payable, Other Payables [Member] | 5.20% Notes Due 2015 [Member]
Debt Instrument [Line Items]
Notes outstanding	[1]	$ 100.0

[1] The fixed interest rate on $100 million of the 3.25% notes due in 2025 is effectively converted to a variable rate by interest rate swaps through 2025. Net interest payments are based on 3 month LIBOR plus 1.22% during this period (our effective rate as of November 30, 2015 was 1.58%). In addition, separate interest rate swaps, settled upon the issuance of these notes in 2015, effectively fixed the interest rate on the $250 million notes at a weighted-average fixed rate of 3.45%

[2] Interest rate swaps, settled upon the issuance of these notes in 2013, effectively fixed the interest rate on the $250 million notes at a weighted-average fixed rate of 3.30%.

[3] The fixed interest rate on $100 million of the 5.20% notes due in December 2015 was effectively converted to a variable rate by interest rate swaps through December 2015. Net interest payments were based on 3 month LIBOR minus 0.05% during this period (our effective rate as of November 30, 2015 was 0.29%).