Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jul. 02, 2011	Jul. 03, 2010	Jul. 02, 2011	Jul. 03, 2010
Net sales	$ 910,175	$ 796,167	$ 1,700,448	$ 1,503,180
Cost of goods sold	622,439	547,999	1,163,653	1,041,310
Gross profit	287,736	248,168	536,795	461,870
Selling, general and administrative	158,432	131,043	303,192	263,933
Research and development	19,882	16,999	38,004	34,210
Operating (loss) income	109,422	100,126	195,599	163,727
Other (income) expense:
Equity (income) losses of unconsolidated subsidiaries	(672)	(1,375)	(907)	(1,459)
Net interest (income) expense	14,613	8,569	23,938	18,096
Income (loss) from continuing operations before income taxes and noncontrolling interest	95,481	92,932	172,568	147,090
Provision for income taxes	27,344	31,320	52,397	49,449
Income from continuing operations	68,137	61,612	120,171	97,641
Gain on disposal of discontinued operations, net of tax		593		1,117
Net income before noncontrolling interest	68,137	62,205	120,171	98,758
Noncontrolling interest	1,425	1,124	2,918	2,356
Net income attributable to Pentair, Inc.	66,712	61,081	117,253	96,402
Net income from continuing operations attributable to Pentair, Inc.	$ 66,712	$ 60,488	$ 117,253	$ 95,285
Basic
Continuing operations	$ 0.68	$ 0.61	$ 1.19	$ 0.96
Discontinued operations		$ 0.01		$ 0.01
Basic earnings per common share	$ 0.68	$ 0.62	$ 1.19	$ 0.97
Diluted
Continuing operations	$ 0.67	$ 0.61	$ 1.17	$ 0.96
Discontinued operations				$ 0.01
Diluted earnings per common share	$ 0.67	$ 0.61	$ 1.17	$ 0.97
Weighted average common shares outstanding
Basic	98,333	98,208	98,190	98,081
Diluted	100,065	99,638	99,825	99,435
Cash dividends declared per common share	$ 0.20	$ 0.19	$ 0.40	$ 0.38