Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Net sales	$ 1,824.8	$ 865.5	$ 5,563.0	$ 2,665.2
Cost of goods sold	1,187.2	587.4	3,734.2	1,794.3
Gross profit	637.6	278.1	1,828.8	870.9
Selling, general and administrative	366.1	203.1	1,191.5	548.5
Research and development	31.5	19.8	97.1	61.4
Operating income	240.0	55.2	540.2	261.0
Other (income) expense:
Equity income of unconsolidated subsidiaries	(0.5)	(0.6)	(1.6)	(2.3)
Gain on sale of business	(0.1)	0	(16.8)	0
Net interest expense	17.2	18.6	52.6	49.5
Income before income taxes and noncontrolling interest	223.4	37.2	506.0	213.8
Provision for income taxes	49.2	4.6	123.1	43.7
Net income before noncontrolling interest	174.2	32.6	382.9	170.1
Noncontrolling interest	1.4	1.2	4.3	4.2
Net income attributable to Pentair Ltd.	172.8	31.4	378.6	165.9
Comprehensive income (loss), net of tax
Net income before noncontrolling interest	174.2	32.6	382.9	170.1
Changes in cumulative translation adjustment	89.1	41.2	(29.1)	(3.8)
Changes in market value of derivative financial instruments	(0.6)	(8.4)	(0.3)	(5.3)
Total comprehensive income	262.7	65.4	353.5	161.0
Less: Comprehensive income attributable to noncontrolling interest	2.6	2.1	5.0	4.1
Comprehensive income attributable to Pentair Ltd.	$ 260.1	$ 63.3	$ 348.5	$ 156.9
Earnings per common share attributable to Pentair Ltd.
Basic (USD per share)	$ 0.87	$ 0.31	$ 1.87	$ 1.67
Diluted (USD per share)	$ 0.85	$ 0.31	$ 1.84	$ 1.63
Weighted average common shares outstanding
Basic (shares)	199.3	100.4	202.1	99.5
Diluted (shares)	202.8	102.9	205.6	101.7
Cash dividends paid per common share (USD per share)	$ 0.25	$ 0.22	$ 0.71	$ 0.66