Net Income (Loss) per Share - Schedule of Computations of Basic and Diluted Net Income (Loss) per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Numerator:
Net income (loss)	$ 21.3	$ 14.9	$ (1.8)	$ 7.1	$ 36.2	$ 5.3
Denominator:
Weighted-average shares outstanding - basic	159.9		157.9		159.6	157.4
Effect of dilutive equity instruments	1.1		0.0		2.2	2.4
Weighted-average shares outstanding - diluted	161.0		157.9		161.8	159.8
Net income (loss) per share - basic	$ 0.13		$ (0.01)		$ 0.23	$ 0.03
Net income (loss) per share - diluted	$ 0.13		$ (0.01)		$ 0.22	$ 0.03

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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+ Details