Employee Benefit And Retirement Plans (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014
Employee Benefit And Retirement Plans [Line Items]
Unrecognized actuarial losses and unrecognized prior service credit, before tax	$ 327.8
Unrecognized actuarial losses and unrecognized prior service credit, net of tax	221.3	$ 203.1
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax	326.6
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Prior Service Cost (Credit), before Tax	1.2
Expected actuarial losses, net of prior service credit, before tax	16.6
Expected actuarial losses, net of prior service credit, net of tax	11.1
Amortization of net actuarial loss	15.9
Amortization of prior service costs	0.7
Dividends paid	$ 217.8	$ 204.9	$ 192.4
Assumed annual increase in cost of health care benefits	7.60%	7.10%
Ultimate health care cost trend rate	4.50%	5.00%
Ultimate health care cost trend rate, year	2028	2027
United States Pension Plans [Member]
Employee Benefit And Retirement Plans [Line Items]
Unrecognized actuarial losses and unrecognized prior service credit, net of tax	$ 149.2	$ 140.6
Benefit obligation	757.0	722.0	728.4
Accrued liability related to the plan	198.1	173.4
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent		0.0
Accumulated benefit obligation	$ 674.9	$ 638.8
Percentage of pension plan assets in equity securities	100.00%	100.00%
International Pension Plans [Member]
Employee Benefit And Retirement Plans [Line Items]
Unrecognized actuarial losses and unrecognized prior service credit, net of tax	$ 76.0	$ 68.2
Benefit obligation	324.9	308.1	341.6
Accrued liability related to the plan	37.3	23.6
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	1.5	3.8
Accumulated benefit obligation	$ 296.9	$ 281.5
Percentage of pension plan assets in equity securities	100.00%	100.00%
Supplemental Employee Retirement Plan [Member]
Employee Benefit And Retirement Plans [Line Items]
Benefit obligation	$ 95.5	$ 89.6
Accrued liability related to the plan	91.8	86.2
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	80.6	79.5
Fair value of McCormick stock held in plan assets	$ 189.6
Number of shares of McCormick stock held in plan assets	2.1
Percentage of participant contribution considered for first condition of plan	100.00%
Percentage of participant salary under first condition of plan	3.00%
Percentage of participant contribution considered for second condition of plan	50.00%
Percentage of participant salary under second condition of plan	2.00%
401(k) plan expense	$ 10.4	9.5	8.7
Dividends paid	3.5
Other Postretirement Benefits [Member]
Employee Benefit And Retirement Plans [Line Items]
Benefit obligation	$ 95.5	$ 92.4	96.3
Age after which employees retire	55 years
Minimum number of years in service	5 years
Assumed discount rate	4.10%	4.20%
U.S. Equity Securities [Member]
Employee Benefit And Retirement Plans [Line Items]
Fair value of McCormick stock held in plan assets	$ 35.3		$ 39.2
Number of shares of McCormick stock held in plan assets	0.4		0.5
Percentage of pension plan assets in equity securities	6.30%	7.20%
Dividends paid	$ 0.7