Business Segments (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2018	Aug. 31, 2017
Segment Reporting Information [Line Items]
Operating income	$ 233.0	$ 168.7	$ 608.4	$ 435.5
Less: Special charges	3.3	4.7	13.9	13.0
Business Combination, Acquisition Expenses Included in Cost of Good Sold		5.9		5.9
Less: Transaction and integration expenses	5.6	24.5	22.1	24.5
Net sales	1,345.3	1,185.2	3,909.7	3,343.2
Operating income excluding special charges	241.9	203.8	644.4	478.9
Income from unconsolidated operations	8.4	8.2	23.9	23.6
Consumer
Segment Reporting Information [Line Items]
Operating income	148.1	117.2	394.0	300.9
Less: Special charges	2.2	3.0	8.6	8.5
Business Combination, Acquisition Expenses Included in Cost of Good Sold		3.2		3.2
Less: Transaction and integration expenses	3.8	16.3	14.8	16.3
Net sales	790.8	696.8	2,333.6	1,991.8
Operating income excluding special charges	154.1	139.7	417.4	328.9
Income from unconsolidated operations	7.7	6.8	20.8	20.0
Flavor Solutions
Segment Reporting Information [Line Items]
Operating income	84.9	51.5	214.4	134.6
Less: Special charges	1.1	1.7	5.3	4.5
Business Combination, Acquisition Expenses Included in Cost of Good Sold		2.7		2.7
Less: Transaction and integration expenses	1.8	8.2	7.3	8.2
Net sales	554.5	488.4	1,576.1	1,351.4
Operating income excluding special charges	87.8	64.1	227.0	150.0
Income from unconsolidated operations	$ 0.7	$ 1.4	$ 3.1	$ 3.6