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Number of appreciation rights, performance shares or performance units granted.

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Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for 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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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Amount of noncash expense for share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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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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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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

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Percentage of vesting of award under share-based payment arrangement.

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Period from grant date that an equity-based award expires, 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 for vested portions of options outstanding and currently exercisable or convertible, 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 for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Stock-Based Compensation - Narrative (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) right $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 shares
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Unrecognized stock-based compensation expense	$ 149.8
Unrecognized stock-based compensation expense, weighted-average period recognition (in years)	1 year 21 days
Stock-based compensation expense	$ 97.7	$ 95.9	$ 101.7
Income tax benefit related to stock-based compensation expense	24.1	23.6	25.1
Effective income tax rate reconciliation, tax benefit, share-based payment arrangement, amount	$ 108.7	$ 94.7	$ 65.2
Expiration period	10 years
Weighted-average per share fair value of option rights granted during the year (in dollars per share) \| $ / shares	$ 68.63	$ 46.56	$ 38.80
Intrinsic value of exercised option rights	$ 1,835.5	$ 1,309.1	$ 1,184.0
Fair value of options vested	$ 53.2	$ 51.0	$ 43.2
Outstanding option rights (in shares) \| shares	8,982,935	10,503,378	12,119,187	13,455,747
Weighted average remaining term for options outstanding	6 years 1 month 2 days	6 years 1 month 13 days	6 years 7 days
Weighted average remaining term for options exercisable	5 years 1 month 13 days	5 years 21 days	4 years 11 months 12 days
Employees
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Intrinsic value of exercised option rights	$ 485.8	$ 407.9	$ 285.8
Restricted Stock
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Award vesting period	3 years
Weighted-average fair value of restricted stock granted during the year (in dollars per share) \| $ / shares	$ 238.89	$ 193.79	$ 144.18
Performance shares
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Award vesting period	3 years
Nonemployee Director Plan
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of appreciation rights, performance shares or performance units granted \| right	0
Outstanding option rights (in shares) \| shares	0	0	0
Stock Option
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Unrecognized stock-based compensation expense	$ 79.5
Unrecognized stock-based compensation expense, weighted-average period recognition (in years)	1 year 1 month 2 days
Award vesting period	3 years
Vesting percentage	33.00%
Restricted Stock
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Vesting percentage	33.00%
Restricted Stock \| Employees
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Unrecognized stock-based compensation expense	$ 68.6
Unrecognized stock-based compensation expense, weighted-average period recognition (in years)	10 months 28 days
Restricted Stock \| Non-Employee Directors
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Unrecognized stock-based compensation expense	$ 1.7
Unrecognized stock-based compensation expense, weighted-average period recognition (in years)	11 months 8 days
Award vesting period	3 years
2006 Employee Plan
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of shares authorized (in shares) \| shares	71,100,000
Number of appreciation rights, performance shares or performance units granted \| right	0
Shares available for grant (in shares) \| shares	9,923,164
Nonemployee Director Plan
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of shares authorized (in shares) \| shares	600,000
Shares available for grant (in shares) \| shares	229,123