Acquisition and divestiture related costs

No definition available.

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Period Type:	duration

- Definition

Increase (decrease) in incentive stock compensation expense.

+ References

No definition available.

+ Details

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(10))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(15))
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(8))
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Business Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Sep. 30, 2017
Segment Reporting Information [Line Items]
Acquisition/divestiture (costs) benefit	$ (27)
Increase (decrease) in incentive stock compensation expense			$ 51
Net sales	4,248	$ 3,574	8,064	$ 6,790
Earnings	658	565	1,161	1,029
Automation Solutions [Member] \| Measurement & Analytical Instrumentation [Member]
Segment Reporting Information [Line Items]
Net sales	860	736	1,632	1,418
Automation Solutions [Member] \| Valves, Actuators & Regulators [Member]
Segment Reporting Information [Line Items]
Net sales	926	497	1,793	946
Automation Solutions [Member] \| Industrial Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	479	419	903	786
Automation Solutions [Member] \| Process Control Systems & Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	506	465	1,015	934
Operating Segments [Member] \| Automation Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	2,771	2,117	5,343	4,084
Earnings	436	328	822	654
Operating Segments [Member] \| Commercial & Residential Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	1,483	1,460	2,735	2,712
Earnings	349	345	601	594
Operating Segments [Member] \| Tools & Home Products [Member]
Segment Reporting Information [Line Items]
Net sales	355	402	685	795
Earnings	96	96	183	184
Operating Segments [Member] \| Climate Technologies [Member]
Segment Reporting Information [Line Items]
Net sales	1,128	1,058	2,050	1,917
Earnings	253	249	418	410
Differences in accounting methods [Member]
Segment Reporting Information [Line Items]
Earnings	55	35	106	68
Corporate and other [Member]
Segment Reporting Information [Line Items]
Earnings	(146)	(102)	(294)	(200)
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	(6)	(3)	(14)	(6)
Earnings	$ (36)	$ (41)	(74)	$ (87)
Pentair's Valves & Controls [Member]
Segment Reporting Information [Line Items]
Net sales					$ 1,400
Pentair's Valves & Controls [Member] \| Order or Production Backlog [Member]
Segment Reporting Information [Line Items]
Amortization of intangible assets			19
FairValueAdjustmentToInventoryOnly [Member] \| Pentair's Valves & Controls [Member]
Segment Reporting Information [Line Items]
Earnings			$ 10