Share-Based Compensation Plans - Narrative (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested share-based compensation	$ 96.0
Weighted average period of recognition of unvested share-based compensation (in years)	3 years
Share-based compensation expense	$ 118.2	$ 125.2	$ 95.5
Share-based Payment Arrangement, Nonemployee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion ratio	1
Granted (in shares)	20,405	14,773	13,968
Stock units granted during period	$ 1.6	$ 1.6	$ 1.5
Share-based compensation expense	$ 1.7	$ 1.7	$ 1.6
Stock Incentive Plan 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock authorized for issuance under the Plan (in shares)	20,000,000
Stock Incentive Plan 2012 Plan and 2002 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grant under the Plan (in shares)	13,718,608
Stock options under the Plan, the 2002 Plan, and the 1992 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)	0	0	0
Stock options under the Plan, the 2002 Plan, and the 1992 Plan | Upper Limit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option maximum term (in years)	10 years
Options vest and become exercisable after the date of grant (in years)	4 years
Stock options under the Plan, the 2002 Plan, and the 1992 Plan | Lower Limit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of the fair value for options to purchase common stock on the date the options are granted	100.00%
Options vest and become exercisable after the date of grant (in years)	1 year
Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion ratio	1
Granted (in shares)	219,314	211,906	204,539
Restricted stock units weighted average grant date fair value (in usd per share)	$ 93.97	$ 113.64	$ 97.77
Performance based units vesting period	3 years
Shares outstanding (in shares)	613,450	607,892	622,817
Aggregate intrinsic value of options granted	$ 51.8	$ 53.8	$ 74.5
Vesting term of units granted	1 year	1 year	1 year
Share-based compensation expense	$ 22.5	$ 28.8	$ 17.3
Performance stock units, granted | Upper Limit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage at which units can vest	150.00%
Performance stock units, granted | Lower Limit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage at which units can vest	0.00%
Restricted Stock Unit Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	1,166,376	1,061,573	846,433
Restricted stock units weighted average grant date fair value (in usd per share)	$ 91.56	$ 110.99	$ 99.31
Fair value of restricted stock units vested	$ 85.9	$ 75.6	$ 89.4
Shares outstanding (in shares)	2,481,171	2,223,657
Share-based compensation expense	$ 95.7	$ 96.4	$ 78.2
Restricted Stock Unit Awards | Fourth Anniversary Of Grant Date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion ratio	1
Percentage at which units can vest	25.00%
Performance based units vesting period	4 years