Share-based Compensation - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Number of shares of common stock reserved for issuance (in shares)	36.6
Outstanding stock options (in shares)	23.3
Unrecognized compensation cost related to nonvested share-based compensation	$ 144.9
Weighted-average period for recognition of nonvested share-based compensation	2 years
Stock options, expiration period	10 years
Stock options exercised total intrinsic value	$ 302.0	$ 290.4	$ 356.1
Proceeds from stock option exercises	285.7	295.5	350.5
Tax benefit realized from stock options exercised	$ 60.2
RSUs vesting percentage	100.00%
RSSUs vesting period	3 years
Total fair value of RSUs vested	$ 80.0	$ 119.4	$ 111.0
Tax benefit realized from RSUs vested	$ 14.3

Aggregate number of common shares reserved for future issuance.

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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 tax benefit from exercise of option under share-based payment arrangement.

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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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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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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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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