Restructuring Activities - Schedule of Changes in the Liabilities Related to the Technology Realignment Program (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Restructuring Cost and Reserve [Line Items]
Beginning Balance			$ 3.9
Expenses	$ 0.8	$ 0.6	4.3	$ 4.2
Cash payments			(7.3)
Non-cash items and other			0.0
Ending balance	0.9		0.9
Professional Fees [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance			0.0
Expenses	0.0	0.0	0.0	0.0
Cash payments			0.0
Non-cash items and other			0.0
Ending balance	0.0		0.0
Retention and Separation [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance			3.9
Expenses	0.8	0.6	4.3	4.2
Cash payments			(7.3)
Non-cash items and other			0.0
Ending balance	0.9		0.9
Other [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance			0.0
Expenses	0.0	$ 0.0	0.0	$ 0.0
Cash payments			0.0
Non-cash items and other			0.0
Ending balance	$ 0.0		$ 0.0

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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