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Financial Instruments (Narrative) (Details) - USD ($)	1 Months Ended	12 Months Ended
Financial Instruments (Narrative) (Details) - USD ($)	Nov. 30, 2015	Nov. 30, 2018	Nov. 30, 2017	Nov. 30, 2016
Derivative [Line Items]
Long-term debt		$ 4,136,400,000	$ 4,769,500,000
Increase (Decrease) in Financial Instruments Used in Operating Activities		0	2,900,000	$ 0
Other comprehensive income (loss) expected to be reclassified in income in next 12 months		1,800,000
Cost of long-term investments		73,700,000	78,400,000
Fair Value, Concentration of Risk, Accounts Receivable		0.10
Foreign Exchange Contracts [Member]
Derivative [Line Items]
Foreign currency to purchase or sell		$ 494,900,000	$ 405,900,000
Maximum time frame for short-term foreign exchange contracts		12 months
Derivative, Notional Amount		$ 160,600,000
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 100,000,000
Interest on interest rate swap contracts	3.25%			3.25%
Derivative Instrument Basis Spread Increase On Variable Rate	1.22%
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
3.25% Notes Due 2025 [Member]
Derivative [Line Items]
Medium-term notes due	$ 250,000,000
Notes Payable, Other Payables [Member] \| 3.25% Notes Due 2025 [Member]
Derivative [Line Items]
Stated Note interest rate		3.25%
Fair Value Hedges [Member] \| Foreign Exchange Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 402,000,000	$ 281,900,000
Fair Value Hedges [Member] \| Other Income [Member] \| Foreign Exchange Contracts [Member]
Derivative [Line Items]
Foreign Currency Transaction Gain (Loss), Realized		(2,900,000)	12,800,000	$ (3,500,000)
Fair Value Hedges [Member] \| Other Income [Member] \| Loans Payable [Member]
Derivative [Line Items]
Foreign Currency Transaction Gain (Loss), Realized		2,700,000	(14,100,000)	$ 3,100,000
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Derivative [Line Items]
Long-term debt		3,172,700,000	3,615,200,000
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Derivative [Line Items]
Long-term debt		$ 866,700,000	$ 1,243,300,000