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Restructuring - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended
	Jan. 31, 2013 Predecessor [Member]	Sep. 30, 2014 Successor [Member]	Sep. 30, 2014 Successor [Member] Selling, General, and Administrative Expenses [Member]	Sep. 30, 2013 Successor [Member] Selling, General, and Administrative Expenses [Member]	Sep. 30, 2014 Successor [Member] Selling, General, and Administrative Expenses [Member]	Sep. 30, 2013 Successor [Member] Selling, General, and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Expense Recorded		$ 2.3	$ 0.9	$ 41.0	$ 2.3	$ 47.5
Expense recorded associated with involuntary termination benefits	$ 0

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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- Definition

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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