Employee Benefit And Retirement Plans (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2019
Employee Benefit And Retirement Plans [Line Items]
Unrecognized actuarial losses and unrecognized prior service credit, before tax	$ 248.7
Unrecognized actuarial losses and unrecognized prior service credit, net of tax	193.6	$ 296.3
Expected actuarial losses, net of prior service credit, before tax	10.0
Expected actuarial losses, net of prior service credit, net of tax	7.3
Amortization of net actuarial loss	9.7
Amortization of prior service costs credits	0.3
Fair value of plan assets at beginning of year	0.0	0.0	$ 0.0
Dividends paid	$ 363.3	$ 330.1	302.2
Assumed annual increase in cost of health care benefits	6.30%	6.80%
Ultimate health care cost trend rate	4.50%	4.50%
Long-term Debt, Fair Value	$ 4,921.5	$ 4,357.1
Dividends	371.5	338.5	309.3
Payments of Ordinary Dividends	0.7	0.9
Fair Value, Inputs, Level 2 [Member]
Employee Benefit And Retirement Plans [Line Items]
Long-term Debt, Fair Value	$ 199.2	195.8
Defined Contribution Retirement Plans [Member]
Employee Benefit And Retirement Plans [Line Items]
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	66.70%
Percentage of participant salary under second condition of plan	3.00%
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage	3.00%
Defined Contribution Plan, Cost	$ 29.8	30.8	28.2
Dividends paid	3.9	3.8
Supplemental Employee Retirement Plan [Member]
Employee Benefit And Retirement Plans [Line Items]
Benefit obligation	104.2	110.5
Non-current pension asset	90.3	86.4
Other Postretirement Benefits [Member]
Employee Benefit And Retirement Plans [Line Items]
Benefit obligation	$ 65.9	$ 70.7	67.2
Age after which employees retire	55 years
Minimum number of years in service	5 years
Assumed discount rate	2.70%	2.30%
Employer contributions	$ 4.1	$ 4.3
U.S. Equity Securities [Member]
Employee Benefit And Retirement Plans [Line Items]
Fair value of McCormick stock held in plan assets	$ 47.7	$ 50.6
Number of shares of McCormick stock held in plan assets	0.6	0.6
Percentage of pension plan assets in equity securities	6.30%	7.40%
Defined Benefit Plan, Equity Securities [Member] | Defined Contribution Retirement Plans [Member]
Employee Benefit And Retirement Plans [Line Items]
Fair value of McCormick stock held in plan assets	$ 238.9
Number of shares of McCormick stock held in plan assets	2.8
United States
Employee Benefit And Retirement Plans [Line Items]
Unrecognized actuarial losses and unrecognized prior service credit, net of tax	$ 167.8	$ 235.5
Benefit obligation	921.5	958.0	884.8
Fair value of plan assets at beginning of year	754.0	688.2	671.9
Accrued liability related to the plan	167.5	269.8
Non-current pension asset	0.0	0.0
Funded status	(167.5)	(269.8)
Accumulated benefit obligation	$ 912.3	$ 945.1
Percentage of pension plan assets in equity securities	100.00%	100.00%
Employer contributions	$ 13.4	$ 10.4
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	41.1	40.6	42.5
United States | Fair Value, Inputs, Level 2 [Member]
Employee Benefit And Retirement Plans [Line Items]
Fair value of plan assets at beginning of year	213.9	198.7
United States | U.S. Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Employee Benefit And Retirement Plans [Line Items]
Fair value of plan assets at beginning of year	143.2	132.9
Foreign Plan [Member]
Employee Benefit And Retirement Plans [Line Items]
Unrecognized actuarial losses and unrecognized prior service credit, net of tax	32.2	63.7
Benefit obligation	354.7	371.7	345.6
Fair value of plan assets at beginning of year	398.4	368.7	340.9
Accrued liability related to the plan	18.0	22.6
Non-current pension asset	61.6	19.6
Funded status	43.7	(3.0)
Accumulated benefit obligation	$ 351.3	$ 367.9
Percentage of pension plan assets in equity securities	100.00%	100.00%
Employer contributions	$ 1.6	$ 1.5
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	14.0	15.3	$ 16.4
Foreign Plan [Member] | Fair Value, Inputs, Level 2 [Member]
Employee Benefit And Retirement Plans [Line Items]
Fair value of plan assets at beginning of year	$ 396.8	$ 365.6