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Earnings (Loss) per Share - Additional Information (Detail) - shares shares in Millions		3 Months Ended	6 Months Ended
	Dec. 17, 2018	Jun. 30, 2018	Jun. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Ordinary shares issued upon mandatory conversion of preferred shares	70.6
Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average shares with anti-dilutive effect on earnings per share		63.0	65.0

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

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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.

+ References

No definition available.

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- Definition

Number of shares issued during the period as a result of the conversion of convertible securities.

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