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. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Net sales	$ 1,758.4	$ 1,713.3	$ 5,236.5	$ 5,168.7
Cost of goods sold	1,133.7	1,098.6	3,401.4	3,429.1
Gross profit	624.7	614.7	1,835.1	1,739.6
Selling, general and administrative	328.8	353.4	1,071.0	1,143.5
Research and development	28.5	31.3	88.2	94.8
Operating income	267.4	230.0	675.9	501.3
Other (income) expense:
Equity income of unconsolidated subsidiaries	(0.3)	(0.5)	(0.9)	(1.7)
Loss (gain) on sale of businesses	0	(0.1)	0.2	(16.8)
Net interest expense	17.1	17.5	51.1	53.8
Income from continuing operations before income taxes and noncontrolling interest	250.6	213.1	625.5	466.0
Provision for income taxes	58.1	46.7	148.3	112.9
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	192.5	166.4	477.2	353.1
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	1.6	7.8	2.6	29.8
Discontinued Operation, Provision for Loss (Gain) on Disposal, Net of Tax	(380.1)	0	(385.7)	0
Net income (loss) before noncontrolling interest	(186.0)	174.2	94.1	382.9
Noncontrolling interest	0	1.4	0	4.3
Net income (loss) attributable to Pentair plc	(186.0)	172.8	94.1	378.6
Income (Loss) from Continuing Operations Attributable to Parent	192.5	165.0	477.2	348.8
Comprehensive income (loss), net of tax
Net income (loss) before noncontrolling interest	(186.0)	174.2	94.1	382.9
Changes in cumulative translation adjustment	(178.8)	89.1	(190.3)	(29.1)
Changes in market value of derivative financial instruments, net of ($0.2), $0.4, ($0.1) and $0.5 tax, respectively	0.8	(0.6)	1.2	(0.3)
Total comprehensive income (loss)	(364.0)	262.7	(95.0)	353.5
Less: Comprehensive income attributable to noncontrolling interest	0	2.6	0	5.0
Comprehensive income (loss) attributable to Pentair plc	$ (364.0)	$ 260.1	$ (95.0)	$ 348.5
Earnings (loss) per ordinary share attributable to Pentair plc
Income (Loss) from Continuing Operations, Per Basic Share	$ 1.01	$ 0.83	$ 2.47	$ 1.73
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	$ (1.99)	$ 0.04	$ (1.98)	$ 0.14
Basic (USD per share)	$ (0.98)	$ 0.87	$ 0.49	$ 1.87
Income (Loss) from Continuing Operations, Per Diluted Share	$ 1.00	$ 0.81	$ 2.43	$ 1.70
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	$ (1.95)	$ 0.04	$ (1.95)	$ 0.14
Diluted (USD per share)	$ (0.95)	$ 0.85	$ 0.48	$ 1.84
Weighted average ordinary shares outstanding
Basic (shares)	190.2	199.3	193.2	202.1
Diluted (shares)	193.1	202.8	196.4	205.6
Common Stock, Dividends, Per Share, Cash Paid	$ 0.30	$ 0.25	$ 0.80	$ 0.71