Consolidated Statements Of Changes In Equity (USD $) In Millions	Total	Common shares	Treasury shares	Capital contribution reserve	Retained earnings	Accumulated other comprehensive income (loss)	Total Pentair Ltd.	Noncontrolling interest
Balance at Dec. 31, 2010	$ 2,205.0	$ 47.4	$ 0	$ 443.5	$ 1,552.8	$ 49.5	$ 2,093.2	$ 111.8
Balance (in shares) at Dec. 31, 2010		98.4	0
Net income (loss)	(3.2)				(7.5)		(7.5)	4.3
Other comprehensive income (loss), net of tax	(89.3)					(87.2)	(87.2)	(2.1)
Tax benefit of share-based compensation	3.9			3.9			3.9
Dividends declared	(79.5)				(79.5)		(79.5)
Share repurchase (in shares)		(0.4)
Share repurchase	(12.8)	(0.2)		(12.6)			(12.8)
Exercise of options, net of shares tendered for payment (in shares)		0.7
Exercise of options, net of shares tendered for payment	14.7	0.3		14.4			14.7
Issuance of restricted shares, net of cancellations (in shares)		0
Issuance of restricted shares, net of cancellations	1.5	0		1.5			1.5
Shares surrendered by employees to pay taxes (in shares)		(0.1)
Shares surrendered by employees to pay taxes	(2.8)	0		(2.8)			(2.8)
Share-based compensation	9.9			9.9			9.9
Balance at Dec. 31, 2011	2,047.4	47.5	0	457.8	1,465.8	(37.7)	1,933.4	114.0
Balance (in shares) at Dec. 31, 2011		98.6	0
Net income (loss)	(104.6)				(107.2)		(107.2)	2.6
Other comprehensive income (loss), net of tax	27.5					26.1	26.1	1.4
Tax benefit of share-based compensation	5.6			5.6			5.6
Dividends declared	(207.4)			(141.1)	(66.3)		(207.4)
Distribution to noncontrolling interest	(1.6)							(1.6)
Issuance of shares related to the Merger (in shares)		113.6	(2.7)
Issuance of shares related to the Merger	4,931.7	65.5	(119.6)	4,985.8			4,931.7
Share repurchase (in shares)			(7.3)
Share repurchase	(334.2)		(334.2)	0			(334.2)
Exercise of options, net of shares tendered for payment (in shares)		0.7	2.3
Exercise of options, net of shares tendered for payment	90.2	0.4	97.6	(7.8)			90.2
Issuance of restricted shares, net of cancellations (in shares)		0.2	1.2
Issuance of restricted shares, net of cancellations	19.0	0.1	59.8	(40.9)			19.0
Shares surrendered by employees to pay taxes (in shares)		(0.1)	(0.4)
Shares surrendered by employees to pay taxes	(21.9)	0	(19.1)	(2.8)			(21.9)
Share-based compensation	35.8			35.8			35.8
Balance at Dec. 31, 2012	6,487.5	113.5	(315.5)	5,292.4	1,292.3	(11.6)	6,371.1	116.4
Balance (in shares) at Dec. 31, 2012		213.0	(6.9)
Net income (loss)	542.6				536.8		536.8	5.8
Other comprehensive income (loss), net of tax	(29.8)					(32.0)	(32.0)	2.2
Tax benefit of share-based compensation	22.6			22.6			22.6
Dividends declared	(198.5)			(198.5)			(198.5)
Distribution to noncontrolling interest	(2.0)							(2.0)
Share repurchase (in shares)			(12.3)
Share repurchase	(715.8)		(715.8)				(715.8)
Exercise of options, net of shares tendered for payment (in shares)	2.9		3.0
Exercise of options, net of shares tendered for payment	96.2		131.8	(35.6)			96.2
Issuance of restricted shares, net of cancellations (in shares)			0.9
Issuance of restricted shares, net of cancellations	0		37.0	(37.0)			0
Shares surrendered by employees to pay taxes (in shares)			(0.3)
Shares surrendered by employees to pay taxes	(16.2)		(12.6)	(3.6)			(16.2)
Share-based compensation	31.1			31.1			31.1
Balance at Dec. 31, 2013	$ 6,217.7	$ 113.5	$ (875.1)	$ 5,071.4	$ 1,829.1	$ (43.6)	$ 6,095.3	$ 122.4
Balance (in shares) at Dec. 31, 2013		213.0	(15.6)