Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014
Tax Credit Carryforward [Line Items]
Increase in current federal income tax expense	$ 60.6	$ 48.9
Current, Federal	67.1	127.7	$ 78.8
Net increase in deferred federal tax benefit	53.4	38.9
Non-U.S. subsidiaries tax loss carryforwards	194.2
Tax loss carryforwards expiring through 2018	7.6
Tax loss carryforwards expiring from 2019 through 2020	7.6
Tax Loss Carryforwards expiring from 2021 Through 2028	49.5
Tax loss carryforwards indefinitely	129.5
Tax credit carryforwards	12.3
Net increase in the valuation allowance	15.5
Unremitted earnings	1,800.0
Unrecognized tax benefits	39.1	58.3	56.5	$ 55.7
Statute expirations	2.1	10.0	8.1
Interest and penalty (income) / expense	0.4	1.2	(0.1)
Interest and penalties accrued	5.3	5.7
Tax benefits that would impact effective tax rate	26.6
Deferred, Federal	$ (23.8)	$ 29.6	$ (9.3)
2022 Expiration [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforwards expiration year	Nov. 30, 2022