Treasury Stock Transactions (Details) - USD ($) shares in Millions, $ in Millions		1 Months Ended			3 Months Ended		6 Months Ended			7 Months Ended	8 Months Ended
		Feb. 28, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025		Jun. 30, 2024	Jul. 31, 2024	Mar. 31, 2025	Nov. 01, 2024	Apr. 02, 2024	Jan. 03, 2024
Equity, Class of Treasury Stock
Cost of Shares Repurchased	[1]				$ 303.3	$ 179.8	$ 505.9		$ 302.8
Number of Treasury Shares Repurchased					3.8	3.5	7.1	[2]	6.0
Commissions Paid on Stock Repurchases					$ 0.4		$ 0.9
Share Repurchases Excise Tax					2.9	$ 1.7	$ 5.0		$ 2.8
November 2024 Accelerated Share Repurchase
Equity, Class of Treasury Stock
Number of Treasury Shares Repurchased	[3]	0.7
ASR prepayment amount												$ 321.0
April 2024 Accelerated Share Repurchase
Equity, Class of Treasury Stock
Number of Treasury Shares Repurchased			0.7
ASR prepayment amount													$ 125.0
January 2024 Accelerated Share Repurchase
Equity, Class of Treasury Stock
Number of Treasury Shares Repurchased				0.5
ASR prepayment amount														$ 100.0
Repurchase Program Authorized in October 2023
Equity, Class of Treasury Stock
Share Repurchase Program, Expiration Date	[4]						Jul. 31, 2024
Authorized Amount of Treasury Share Repurchases Under Stock Repurchase Program	[4]				500.0		$ 500.0
Cost of Shares Repurchased										$ 464.2
Remaining Amount of Treasury Share Repurchases Authorized Under Stock Repurchase Program	[4]				0.0		$ 0.0
Repurchase Program Authorized in July 2024
Equity, Class of Treasury Stock
Share Repurchase Program, Expiration Date	[5]						Mar. 31, 2025
Authorized Amount of Treasury Share Repurchases Under Stock Repurchase Program	[5]				1,000.0		$ 1,000.0
Cost of Shares Repurchased											$ 706.8
Remaining Amount of Treasury Share Repurchases Authorized Under Stock Repurchase Program	[5]				0.0		0.0
Repurchase Program Authorized in February 2025
Equity, Class of Treasury Stock
Authorized Amount of Treasury Share Repurchases Under Stock Repurchase Program					1,000.0		1,000.0
Cost of Shares Repurchased					300.0
Remaining Amount of Treasury Share Repurchases Authorized Under Stock Repurchase Program					$ 700.0		$ 700.0

[1] 2Includes $0.4 million and $0.9 million of commissions for the three and six months ended June 30, 2025, respectively, and a de minimis amount of commissions for the three and six months ended June 30, 2024. Also includes $2.9 million and $5.0 million of excise tax for the three and six months ended June 30, 2025, respectively, and $1.7 million and $2.8 million of excise tax for the three and six months ended June 30, 2024, respectively.

[2] 1For the six months ended June 30, 2025, includes 0.7 million shares related to the settlement of the November 2024 accelerated share repurchase agreement (ASR) which occurred in February 2025.

[3] 1The final price adjustment settlement, along with the delivery of the remaining shares, occurred in February 2025, resulting in the delivery to us of 0.7 million additional shares. As a result of the final settlement occurring subsequent to December 31, 2024, we recorded a decrease of $80.3 million to additional paid-in capital within stockholders' equity on our consolidated balance sheet for the value of the shares held back by the counterparty as of December 31, 2024, which was reclassified to treasury stock in the first quarter of 2025 in connection with the final settlement of the agreement.

[4] 2Concurrent with the announcement of the July 2024 repurchase program, we also announced the termination of the October 2023 program as of July 31, 2024, and all unused amounts under that program expired as of that date.

[5] 1Concurrent with the announcement of the February 2025 repurchase program, we also announced the termination of the July 2024 program as of March 31, 2025, and all unused amounts under that program expired as of that date.