Note 6 - Accounting for Share-based Compensation (Tables)

9 Months Ended

Aug. 31, 2019

Notes Tables

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]

	Three Months Ended		Nine Months Ended
	August 31, 2019	September 1, 2018	August 31, 2019			September 1, 2018
Expected life (in years)	4.75	4.75	4.75			4.75
Weighted-average expected volatility	23.88%	23.36%	24.26%			23.30%
Expected volatility	23.88%	23.36%	23.88%	-	24.76%	23.18%	-	23.58%
Risk-free interest rate	1.68%	2.72%	1.68%	-	2.55%	2.38%	-	2.90%
Weighted-average expected dividend yield	1.38%	1.16%	1.40%			1.14%
Expected dividend yield range	1.38%	1.16%	1.26%	-	1.45%	1.12%	-	1.24%
Weighted-average fair value of grants	$9.12	$11.75	$9.80			$11.38

Share-based Payment Arrangement, Option, Activity [Table Text Block]

				Average
	Options			Exercise Price
Outstanding at December 1, 2018		4,466,106		$	44.72
Granted		962,130			45.47
Exercised		(96,740	)		25.79
Forfeited or cancelled		(30,036	)		48.73
Outstanding at August 31, 2019		5,301,460		$	45.18

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

				Weighted-
		Weighted-		Average
		Average		Remaining
		Grant		Contractual
		Date Fair		Life
	Units	Value		(in Years)
Nonvested at December 1, 2018	414,353	$	47.45	1.0
Granted	288,719		44.16	2.4
Vested	(190,324)		45.40	-
Forfeited	(28,838)		40.56	0.6
Nonvested at August 31, 2019	483,910	$	46.70	1.0

Schedule of Deferred Compensation Arrangement with Individual, Share-based Payments [Table Text Block]

	Non-employee
	Directors	Employees	Total
Units outstanding December 1, 2018	479,787	29,735	509,522
Participant contributions	16,900	8,495	25,395
Company match contributions	23,194	850	24,044
Payouts	-	(4,651)	(4,651)
Units outstanding August 31, 2019	519,881	34,429	554,310