Stock-Based Compensation Plans - Nonqualified Stock Options, Range of Exercise Prices (Details) - Nonqualified Stock Options - $ / shares shares in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Summary of weighted-average remaining contractual lives for stock options outstanding and range of exercise prices
Number of options outstanding (in shares)	6.2	6.5
Weighted-average remaining contractual life for stock options exercisable	6 years
Range of exercise prices, Range 1
Summary of weighted-average remaining contractual lives for stock options outstanding and range of exercise prices
Lower limit of exercise price range (in dollars per share)	$ 27.46
Upper limit of exercise price range (in dollars per share)	$ 48.11
Number of options outstanding (in shares)	1.4
Weighted-average remaining contractual life	2 years 6 months
Range of exercise prices, Range 2
Summary of weighted-average remaining contractual lives for stock options outstanding and range of exercise prices
Lower limit of exercise price range (in dollars per share)	$ 48.12
Upper limit of exercise price range (in dollars per share)	$ 52.41
Number of options outstanding (in shares)	1.6
Weighted-average remaining contractual life	7 years
Range of exercise prices, Range 3
Summary of weighted-average remaining contractual lives for stock options outstanding and range of exercise prices
Lower limit of exercise price range (in dollars per share)	$ 52.42
Upper limit of exercise price range (in dollars per share)	$ 55.89
Number of options outstanding (in shares)	1.1
Weighted-average remaining contractual life	7 years 2 months 12 days
Range of exercise prices, Range 4
Summary of weighted-average remaining contractual lives for stock options outstanding and range of exercise prices
Lower limit of exercise price range (in dollars per share)	$ 55.90
Upper limit of exercise price range (in dollars per share)	$ 62.75
Number of options outstanding (in shares)	0.8
Weighted-average remaining contractual life	9 years 1 month 6 days
Range of exercise prices, Range 5
Summary of weighted-average remaining contractual lives for stock options outstanding and range of exercise prices
Lower limit of exercise price range (in dollars per share)	$ 62.76
Upper limit of exercise price range (in dollars per share)	$ 63.98
Number of options outstanding (in shares)	1.3
Weighted-average remaining contractual life	5 years 8 months 12 days
Range of exercise prices, Total Range
Summary of weighted-average remaining contractual lives for stock options outstanding and range of exercise prices
Lower limit of exercise price range (in dollars per share)	$ 27.46
Upper limit of exercise price range (in dollars per share)	$ 63.98
Number of options outstanding (in shares)	6.2

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Number of options outstanding, including both vested and non-vested options.

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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