Supplemental Financial Statement Information - Accounts Receivable (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ (30.0)	$ (32.2)
Total accounts receivable, net	836.9	815.2
Accounts Receivable Trade [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	854.2	826.9
Accounts Receivable Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 12.7	$ 20.5