Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Nov. 30, 2019
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	$ (1,506.4)		$ (1,415.7)
Intangible assets, gross	5,569.9		5,584.7
Intangible assets, net	4,063.5		4,169.0
Amortization of Intangible Assets	94.2	$ 95.7
Customer relationships
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	3,465.3		3,476.1
Finite-Lived Intangible Assets, Accumulated Amortization	(671.9)		(628.7)
Finite-Lived Intangible Assets, Net	2,793.4		2,847.4
Developed technology
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	946.7		949.6
Finite-Lived Intangible Assets, Accumulated Amortization	(227.5)		(208.9)
Finite-Lived Intangible Assets, Net	719.2		740.7
Information databases
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	590.9		591.6
Finite-Lived Intangible Assets, Accumulated Amortization	(324.1)		(310.9)
Finite-Lived Intangible Assets, Net	266.8		280.7
Trademarks
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	486.8		487.0
Finite-Lived Intangible Assets, Accumulated Amortization	(216.7)		(203.0)
Finite-Lived Intangible Assets, Net	270.1		284.0
Developed computer software
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	76.1		76.3
Finite-Lived Intangible Assets, Accumulated Amortization	(64.7)		(62.9)
Finite-Lived Intangible Assets, Net	11.4		13.4
Other
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	4.1		4.1
Finite-Lived Intangible Assets, Accumulated Amortization	(1.5)		(1.3)
Finite-Lived Intangible Assets, Net	$ 2.6		$ 2.8