Investments In Affiliates (Summarized Annual And Year-End Information Of Unconsolidated Affiliates) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Nov. 30, 2020	Aug. 31, 2020	May 31, 2020	Feb. 29, 2020	Nov. 30, 2019	Aug. 31, 2019	May 31, 2019	Feb. 28, 2019	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2018
Investments in and Advances to Affiliates [Line Items]
Revenues	$ 1,557.9	$ 1,430.3	$ 1,401.1	$ 1,212.0	$ 1,484.8	$ 1,329.2	$ 1,301.9	$ 1,231.5	$ 5,601.3	$ 5,347.4	$ 5,302.8
Gross profit	660.7	$ 590.3	$ 579.5	$ 469.9	630.0	$ 539.9	$ 508.5	$ 466.9	2,300.4	2,145.3	2,093.3
Assets, Current	2,083.6				1,550.2				2,083.6	1,550.2
Liabilities, Current	3,046.5				2,154.4				3,046.5	2,154.4
Unconsolidated Affiliates [Member]
Investments in and Advances to Affiliates [Line Items]
Revenues									870.3	863.0	807.9
Gross profit									318.0	316.2	290.5
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									93.7	90.5	78.9
Assets, Current	421.7				426.3				421.7	426.3	342.1
Assets, Noncurrent	126.2				134.0				126.2	134.0	129.9
Liabilities, Current	192.3				223.8				192.3	223.8	172.1
Liabilities, Noncurrent	$ 12.2				$ 9.2				$ 12.2	$ 9.2	$ 10.0