Selected Quarterly Data - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
Dec. 31, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 31, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Effect of Fourth Quarter Events [Line Items]
Net sales	$ 1,802.5us-gaap_SalesRevenueNet	$ 1,758.4us-gaap_SalesRevenueNet	$ 1,834.1us-gaap_SalesRevenueNet	$ 1,644.0us-gaap_SalesRevenueNet	$ 1,831.0us-gaap_SalesRevenueNet	$ 1,713.3us-gaap_SalesRevenueNet	$ 1,791.7us-gaap_SalesRevenueNet	$ 1,663.7us-gaap_SalesRevenueNet	$ 7,039.0us-gaap_SalesRevenueNet	$ 6,999.7us-gaap_SalesRevenueNet	$ 4,306.8us-gaap_SalesRevenueNet
Income (loss) from continuing operations					162.9	165.0	138.6	45.2	607.0	511.7	(81.5)
Mark-to-market actuarial gains (losses) on pension and post-retirement benefit plans	49.9				63.2				49.9	(63.2)	141.7
Inventory fair value step-up and customer backlog								76.6pnr_InventoryStepUpRelatedToMerger		86.6pnr_InventoryStepUpRelatedToMerger	157.7pnr_InventoryStepUpRelatedToMerger
Loss on early extinguishment of debt									0	0	75.4
Restructuring cost	35.5us-gaap_RestructuringCosts		35.4us-gaap_RestructuringCosts	17.4us-gaap_RestructuringCosts	54.1us-gaap_RestructuringCosts			26.6us-gaap_RestructuringCosts
Impairment charges, related to trade names					$ 11.0				$ 0	$ 11.0	$ 60.7

Inventory Step Up Related To Merger

No definition available.

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

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Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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The increase (decrease) during the reporting period in the amount due to fund pension and non-pension benefits to employees, retired and disabled former employees.

+ References

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Amount, after cash payment, 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.

+ References

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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