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Stock-Based Compensation Plans - Valuation Options (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Dividend yield (as a percent)	3.50%
Estimated volatility	27.10%
Risk free rate	0.81%
Expected life of options	5 years
Estimated fair value (in dollars per share)	$ 28.64
Performance awards
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Market closing price (in dollars per share)	$ 178.38	$ 224.64	$ 195.86
Dividend yield (as a percent)	3.50%	2.80%	3.10%
Estimated volatility, minimum (as a percent)	22.00%	11.10%	13.90%
Estimated volatility, maximum (as a percent)	49.00%	15.50%	18.80%
Risk-free interest rate, minimum (as a percent)	0.06%	1.45%	2.46%
Risk-free interest rate, maximum (as a percent)	0.38%	1.62%	2.57%
Estimated performance award value based on total shareholder return measure (in dollars per share)	$ 213.16	$ 254.72	$ 204.15
Historical volatility (as a percent)	50.00%	50.00%	50.00%
Implied volatility (as a percent)	50.00%	50.00%	50.00%

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- Definition

The historical volatility rate used in valuation technique of calculation of fair value of awards.

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The implied volatility rate used in valuation technique of calculation of fair value of awards.

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Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award.

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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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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Price of a single share of a number of saleable stocks of a company.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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