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Revenue (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands

3 Months Ended

9 Months Ended

Jun. 30, 2019

Jun. 30, 2018

Mar. 31, 2018

Jun. 30, 2019

Jun. 30, 2018

Oct. 01, 2018

Sep. 30, 2018

Dec. 31, 2016

Retained earnings

$ 2,168,204

$ 2,168,204

$ 1,966,643

Net sales

752,005

$ 588,117

2,163,660

$ 1,606,514

Earnings before income taxes

92,314

54,417

243,997

140,551

Net earnings

$ 66,107

$ 49,117

$ 192,806

$ 105,866

Diluted earnings per share

$ 1.02

$ 0.77

$ 2.99

$ 1.66

Revenue related to noncash consideration

$ 23,176

$ 67,938

Increase in revenue related to changes in estimated total lifetime sales

4,482

6,017

Increase in cost of goods sold related to changes in estimated total lifetime sales

9,255

9,578

Capitalized costs to fulfill contracts

97,789

97,789

Amortized capitalized costs to fulfill contracts

207

207

Amortized deferred liability to revenue

278

278

Accounts receivable

650,777

650,777

432,003

^[1],[2]

Noncurrent unbilled receivables

$ 894

$ 894

0

Percent of total billed and unbilled accounts receivable from U.S. Government

10.00%

10.00%

Current contract liabilities

$ 26,307

$ 26,307

9,659

Revenue from contract liabilities

6,147

26,459

Noncurrent contract liabilities

^[3]

332,927

332,927

235,300

Remaining performance obligation amount

$ 1,659,788

$ 1,659,788

Woodward and General Electric Joint Venture [Member]

Ownership interest, joint venture

50.00%

50.00%

50.00%

Total consideration

$ 323,410

Material Rights [Member]

Remaining performance obligation amount

$ 436,876

$ 436,876

Retained Earnings [Member]

Net earnings

66,107

$ 49,117

192,806

$ 105,866

ASC 606 [Member]

Cumulative effect from adoption

38,700

38,700

Retained earnings

$ 2,005,388

Capitalized costs to fulfill contracts

57,529

Accounts receivable

^[1],[2]

567,671

Contract liabilities

57,529

ASC 606 [Member] | Retained Earnings [Member]

Cumulative effect from adoption

38,745

38,745

Aerospace [Member]

Net sales

498,775

1,374,616

Revenue related to noncash consideration

22,947

66,961

Industrial [Member]

Net sales

253,230

789,044

Revenue related to noncash consideration

$ 229

$ 977

Net Sales [Member] | Manufactured Products [Member]

Percentage of attributable to revenue

84.00%

86.00%

Net Sales [Member] | MRO Products [Member]

Percentage of attributable to revenue

13.00%

12.00%

Liability Related To Customer Supplied Inventory [Member]

Current contract liabilities

$ 13,021

$ 13,021

Liability Related To Customer Supplied Inventory [Member] | ASC 606 [Member]

Current contract liabilities

11,951

Deferred Revenue From Material Rights Related To Engineering And Development Funding [Member]

Current contract liabilities

3,137

3,137

Noncurrent contract liabilities

98,889

98,889

Deferred Revenue From Material Rights Related To Engineering And Development Funding [Member] | ASC 606 [Member]

Current contract liabilities

664

Noncurrent contract liabilities

79,347

As Previously Reported [Member] | ASC 606 [Member]

Retained earnings

1,995,570

28,927

Accounts receivable

^[1],[2]

536,910

$ 104,907

As Previously Reported [Member] | ASC 606 [Member] | Retained Earnings [Member]

Cumulative effect from adoption

28,927

Adjustments [Member] | ASC 606 [Member]

Retained earnings

50,716

50,716

9,818

Net sales

36,965

106,366

Earnings before income taxes

463

15,204

Net earnings

$ 663

$ 11,971

Diluted earnings per share

$ 0.01

$ 0.19

Accounts receivable

$ 194,495

$ 194,495

30,761

^[1],[2]

Adjustments [Member] | Aerospace [Member] | ASC 606 [Member]

Accounts receivable

135,668

Increase [Member] | ASC 606 [Member] | Retained Earnings [Member]

Cumulative effect from adoption

38,745

Retained earnings

$ 9,818

Out-Of-Period Correction [Member] | ASC 606 [Member]

Net sales

13,614

Earnings before income taxes

8,041

Net earnings

$ 6,037

Diluted earnings per share

$ 0.09

[1]	The adoption of ASC 606 changed the revenue recognition practices for a number of revenue generating activities across Woodward’s businesses, although the most significant impacts are concentrated in product being produced for customers that have no alternative use to Woodward and Woodward has an enforceable right to payment with a profit, and MRO. The revenue related to these activities, which previously was accounted for on a point in time basis, is now required to use an over time model because the associated contracts meet one or more of the mandatory criteria established in ASC 606, as described above, and are included as current unbilled receivables in “Accounts receivable” and noncurrent unbilled receivables in “Other assets.” The change in the timing of revenue recognized in connection with over time contracts similarly changed the timing of manufacturing cost recognition and certain engineering and development costs, which are reflected as a reduction to inventory.
[2]	The value of noncash consideration in the form of exchanged products and other customer provided inventory is reflected in “Inventories,” and in contract liabilities, which are included in “Accrued liabilities.”
[3]	See Note 3, Revenue, for more information on net noncurrent contract liabilities.

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