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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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Long-Term Debt - Schedule of Long-Term Debt (Detail) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Jan. 01, 2022	Mar. 31, 2018
Debt Instrument [Line Items]
Borrowings under senior secured credit facility, carrying value	$ 890.5	$ 971.3
Other	3.5	1.2
Total	2,551.6	2,692.0
Less: current portion	232.6	29.5
Long-term portion	2,319.0	2,662.5
2.625% Convertible Senior Notes Due 2024 [Member]
Debt Instrument [Line Items]
Convertible senior notes, carrying value	196.6	261.2
Total			$ 59.1	$ 410.1
4.250% Convertible Senior Notes Due 2028 [Member]
Debt Instrument [Line Items]
Convertible senior notes, carrying value	270.1	269.1
7.875% Senior Notes Due 2025 [Member]
Debt Instrument [Line Items]
Senior notes, carrying value	596.7	595.6
4.875% Senior Notes Due 2029 [Member]
Debt Instrument [Line Items]
Senior notes, carrying value	$ 594.2	$ 593.6