Financial Instruments (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended
	Feb. 28, 2014	Nov. 30, 2014	Mar. 31, 2006	Nov. 30, 2013
Derivative [Line Items]
Other comprehensive income (loss) expected to be reclassified in income in next 12 months		$ 4,300,000
Cost of long-term investments		80,100,000		77,500,000
Fair Value, Concentration of Risk, Accounts Receivable		0.21
Foreign Exchange Contracts [Member]
Derivative [Line Items]
Foreign currency to purchase or sell		262,700,000		204,900,000
Maximum time frame for short-term foreign exchange contracts		12 months
Derivative, Notional Amount		127,100,000
Derivative, Term of Contract	7 days
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount			100,000,000
Interest on interest rate swap contracts			5.20%
Basis spread on variable interest rate derivative contracts, percentage below LIBOR			0.05%
Maturity date of interest rate swap contracts			December 2015
Derivative instruments fair value hedge			100,000,000
Hedge ineffectiveness recognized on interest rate swaps			0
Maximum [Member]
Derivative [Line Items]
Maturity period for remaining foreign currency contracts (in months)		12 months
Minimum [Member]
Derivative [Line Items]
Maturity period for remaining foreign currency contracts (in months)		1 month
Interest Rate Swap [Member]
Derivative [Line Items]
Cash flow hedges settled in cash for gain (loss)				(9,000,000)
Weighted average fixed interest rate on issuance of notes				3.30%
Aggregate principal amount				250,000,000
Interest Rate Swap [Member] | Treasury Lock [Member]
Derivative [Line Items]
Derivative, Notional Amount				175,000,000
5.20% Medium-Term Notes Due 2015 [Member]
Derivative [Line Items]
Medium-term notes due			$ 200,000,000
Debt instrument interest rate			5.20%
Debt instrument maturity year			2015