Stock-Based Compensation (Narrative) (Details) $ / shares in Units, $ in Millions	12 Months Ended
Nov. 30, 2021 USD ($) award_type $ / shares shares	Nov. 30, 2020 USD ($) $ / shares shares	Nov. 30, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Stock-based Compensation Award Types \| award_type	4
Total stock-based compensation expense \| $	$ 66.6	$ 46.0	$ 37.2
Unrecognized stock-based compensation expense \| $	$ 19.7
Weighted average period for unrecognized stock-based compensation to be recognized	1 year 3 months 18 days
Common Stock, Capital Shares Reserved for Future Issuance \| shares	5,500,000
Intrinsic value of options outstanding \| $	$ 133.3
Intrinsic value for exercisable options \| $	124.9
Total intrinsic value for all options exercised \| $	$ 10.7	$ 68.4	$ 111.0
Dividend yield	1.50%	1.80%	1.50%
Expected lives	7 years 10 months 24 days	7 years 10 months 24 days	7 years 6 months
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Granted, Shares \| shares	219,000	296,000	258,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period \| shares	336,000	325,000	318,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Exercisable period	10 years
Weighted-average grant-date fair value of an option granted (usd per share) \| $ / shares	$ 18.36	$ 13.27	$ 13.76
Long-term Performance Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period for unrecognized stock-based compensation to be recognized	3 years
Granted, Shares \| shares	141,000	130,000	136,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period \| shares	124,000	88,000	114,000
Price Vested Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense \| $	$ 13.5
Weighted average period for unrecognized stock-based compensation to be recognized	2 years
Exercisable period	10 years
Weighted-average grant-date fair value of an option granted (usd per share) \| $ / shares	$ 93.49
Granted, Shares \| shares	15,000	2,482,000
Risk free interest rate, maximum	0.85%
Dividend yield	1.50%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	21.20%
Price Vested Stock Options [Member] \| Share-based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value of an option granted (usd per share) \| $ / shares	$ 11.88
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent	60.00%
Price Vested Stock Options [Member] \| Share-based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value of an option granted (usd per share) \| $ / shares	$ 9.26
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent	80.00%
Price Vested Stock Options [Member] \| Share-based Payment Arrangement, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value of an option granted (usd per share) \| $ / shares	$ 7.05
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent	100.00%
Price Vested Stock Options [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected lives	5 years 7 months 6 days
Price Vested Stock Options [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected lives	6 years 2 months 12 days

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Aggregate number of common shares reserved for future issuance.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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Purchase price of common stock expressed as a percentage of its fair value.

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