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Capital Stock (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2026	Mar. 31, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Feb. 25, 2026	Dec. 31, 2025	Aug. 24, 2015
Equity, Class of Treasury Stock [Line Items]
Shares repurchased	$ 655.0	$ 586.0
Payments for repurchase of common stock				$ 1,243.0	$ 13.0
Accrued payment	$ 12.0			$ 12.0			$ 0.0
Share Repurchase Programs
Equity, Class of Treasury Stock [Line Items]
Shares repurchased (in shares) (less than)	5.7		0.1	10.5	0.1
Shares repurchased	$ 648.0		$ 1.0	$ 1,243.0	$ 13.0
2015 Stock Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Shares repurchased (in shares) (less than)	1.4
Shares repurchased				$ 182.0
Stock repurchase program, authorized amount								$ 500.0
Settlement of Employee Tax Withholding Obligations
Equity, Class of Treasury Stock [Line Items]
Shares repurchased (in shares) (less than)	0.1		0.1	0.1	0.1
Shares repurchased	$ 0.2		$ 1.0	$ 14.0	$ 13.0
February 2026 Program
Equity, Class of Treasury Stock [Line Items]
Shares repurchased (in shares) (less than)	5.7			9.0
Shares repurchased	$ 648.0			$ 1,047.0
Stock repurchase program, authorized amount						$ 1,500.0
Remaining authorized amount of repurchase	$ 453.0			$ 453.0