Acquisitions and Divestitures - Purchase Price (Details) (Tyco Flow Control Business [Member], USD $) In Millions, unless otherwise specified	Sep. 28, 2012
Tyco Flow Control Business [Member]
Business Acquisition [Line Items]
Value of common shares issued to Tyco shareholders	$ 4,811.4	[1]
Value of replacement equity-based awards to holders of Tyco equity-based awards	111.2	[2]
Cash paid to Tyco shareholders in lieu of fractional common shares	0.5	[3]
Cash paid to Tyco in settlement of the working capital and net indebtedness calculation	84.4
Total purchase price	$ 5,007.5

[1] Equals 110.9 million Pentair Ltd. shares distributed to Tyco shareholders multiplied by the Merger date share price of $43.39.

[2] In accordance with applicable accounting guidance, the fair value of replacement equity-based awards attributable to pre-combination service is recorded as part of the consideration transferred in the Merger, while the fair value of replacement equity-based awards attributable to post-combination service is recorded separately from the business combination and recognized as compensation cost in the post-acquisition period over the remaining service period. The fair value of our equivalent stock options was estimated using the Black-Scholes valuation model utilizing various assumptions.

[3] Equals cash paid to Tyco shareholders in lieu of less than 0.1 million Pentair Ltd. fractional shares multiplied by the Merger date share price of $43.39.