Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	May 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax unrecognized compensation cost	$ 462.1
Weighted average period for recognizing compensation cost (in years)	1 year 7 months 6 days
Dividend yield	0.00%
Weighted average fair value of equity instruments other than options granted (in dollars per share)	$ 74.89	$ 107.17	$ 99.09
Outstanding (in shares)	0
Vested or expected to vest (in shares)	0	0	0
Liability classified awards outstanding	$ 16.3	$ 3.0
Capitalized Internal Use Software
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional stock based compensation	$ 32.5	$ 31.3	$ 32.4
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	10 years
Total pre-tax intrinsic value of options exercised			$ 0.6
Stock options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Stock options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	0.00%	0.00%	0.00%
Weighted average fair value of equity instruments other than options granted (in dollars per share)	$ 23.12	$ 33.26	$ 36.17
Deferred Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Each DSU receives this number of shares of common stock upon vesting (in whole numbers)	1
Holder elect to defer vested shares period, minimum (in years)	1 year
Holder elect to defer vested shares period, maximum (in years)	10 years
The amount typically vested by anniversary grant date (percentage)	100.00%
Director's minimum period of service before vesting accelerates (in years)	1 year
Deferred Stock Units | Director Vesting Acceleration
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	100.00%
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Each RSU receives this number of shares of common stock upon vesting	1
Restricted stock unit vesting provision, minimum (in years)	3 years
Restricted stock unit vesting provision, maximum (in years)	4 years
Aggregate intrinsic value	$ 955.9
Weighted average contractual remaining life (in years)	1 year 7 months 6 days
2013 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock approved for issuance under plan (in shares)	33,800,000
Common stock available for grant (in shares)	7,400,000			0
1999 ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum amount of shares available for issuance (in shares)	1,500,000
Aggregate amount of shares available, maximum (in shares)	20,000,000
Discount on fair market value for purchase of stock (in percentage)	15.00%
Share purchase interval term (in months)	6 months
Amount withheld from employees for future purchases	$ 6.3
Non-Executive Short-Term Incentive Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
Non-Executive Incentive Program, Migrate Applications From Third-Party Cloud Platforms
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	2 years