Financial Instruments - Fair Value of Derivative Instruments on Balance Sheet (Detail) - USD ($) $ in Millions	May 31, 2019	Nov. 30, 2018	May 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total derivative assets, Fair Value	$ 26.1	$ 4.4	$ 5.8
Total derivative liabilities, Fair Value	9.3	12.8	11.0
Interest rate contracts | Other current assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate contracts, Fair Value	12.1	0.0	0.0
Derivative Asset, Notional Amount	350.0	0.0	0.0
Interest rate contracts | Other accrued liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate contracts, Fair Value	0.0	6.4	5.8
Derivative Asset, Notional Amount	0.0	100.0	100.0
Foreign exchange contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment Foreign Currency, Contract, Foreign Currency Amount	76.1
Foreign exchange contracts | Other current assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset, Notional Amount	425.4	199.5	297.7
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net	6.9	4.4	5.8
Foreign exchange contracts | Other accrued liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net	1.6	6.4	5.2
Notes subject to interest rate hedge	102.8	$ 295.4	$ 155.2
Cross currency contracts | Other accrued liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net	7.7
Notes subject to interest rate hedge	247.5
Cross currency contracts | Other Long-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset, Notional Amount	245.1
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net	7.1
Interest Rate Swap | Treasury Lock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative, Notional Amount	$ 350.0
Three Point Two Five Zero Notes Due On Two Thousand Twenty Five [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated Note interest rate	3.25%
Three Point Two Five Zero Notes Due On Two Thousand Twenty Five [Member] | Interest Rate Swap | Treasury Lock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative, Basis Spread on Variable Rate	1.22%
Derivative, Notional Amount	$ 100.0
Derivative, Fixed Interest Rate	3.25%
Three Point Two Five Zero Notes Due On Two Thousand Twenty Five [Member] | Interest Rate Swap 3.25% | Treasury Lock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative, Notional Amount	$ 100.0
Notes Payable	$ 250.0
Three Point Four Zero Notes Due Two Thousand Twenty Seven [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated Note interest rate	3.40%
Three Point Four Zero Notes Due Two Thousand Twenty Seven [Member] | Interest Rate Swap | Treasury Lock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative, Notional Amount	$ 250.0
Notes Payable	$ 750.0
Three Point Four Zero Notes Due Two Thousand Twenty Seven [Member] | Interest Rate Swap 3.40% | Treasury Lock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative, Basis Spread on Variable Rate	0.685%
Derivative, Notional Amount	$ 250.0
Derivative, Fixed Interest Rate	3.40%