Retirement Benefits - Additional Information (Detail) - USD ($)	3 Months Ended	8 Months Ended	11 Months Ended	12 Months Ended
	Jan. 30, 2015	Oct. 02, 2015	Oct. 02, 2015	Sep. 29, 2017	Sep. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation				$ 486,000,000	$ 482,200,000
Defined benefit plan, plan assets				457,575,000	425,781,000
Company contribution expense			$ 9,500,000	10,100,000	10,700,000
Effect of 25 basis point increase in discount rate on pension liabilities				13,700,000
Effect of 25 basis point decrease in discount rate on pension liabilities				$ 14,400,000
Increase/decrease health care trend rate basis points				1.00%
Increase in Post Retirement Benefit Obligation based on basis points				$ 1,400,000
Decrease in Post Retirement Benefit Obligation based on basis points				$ 1,200,000
Employer matching contribution percent				6.00%
Defined contribution plan description				The three formulas used are: 25% of the first 6%; or 50% of the first 6%; or 100% of the first 2% and 50% on the next 4%.
Other Non-U.S. Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan projected benefit obligation				$ 49,600,000
Accumulated benefit obligation				39,300,000
Defined benefit plan, plan assets				23,000,000
Defined benefit plan, funded (underfunded) status				(26,600,000)
Company contribution expense				1,800,000	5,000,000
Expected funding requirement for fiscal 2018				$ 1,000,000
Minimum
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan expected future investment return				3.25%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan expected future investment return				8.25%
Esterline U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan participation, percentage				40.00%
Defined benefit plan pension benefits based on average compensation, years				5 years
Defined benefit plan, service period related to benefit, years				5 years
Defined benefit plans based on compensation during last years of employment				10 years
Defined benefit plan amendment date				Jan. 01, 2003
Defined benefit plan projected benefit obligation				$ 321,200,000
Accumulated benefit obligation				309,200,000
Defined benefit plan, plan assets				294,400,000
Defined benefit plan, funded (underfunded) status				(26,800,000)
Contractual termination	$ 16,600,000	$ 1,400,000
Settlement	$ 3,000,000		$ 500,000
Esterline U.S. Plans | Supplemental Retirement Plan For Key Executives
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, underfunded status				22,400,000
Esterline U.S. Plans | Non-qualified Plans
Defined Benefit Plan Disclosure [Line Items]
Company contribution expense				1,400,000	1,400,000
Esterline U.S. Plans | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Expected funding requirement for fiscal 2018				$ 0
Esterline U.S. Plans | Minimum
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan annual pay credits				2.00%
Esterline U.S. Plans | Maximum
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan annual pay credits				6.00%
CMC Defined Pension Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan projected benefit obligation				$ 138,500,000
Accumulated benefit obligation				137,500,000
Defined benefit plan, plan assets				140,200,000
Defined benefit plan, funded (underfunded) status				1,700,000
Company contribution expense				3,500,000	$ 5,600,000
Expected funding requirement for fiscal 2018				$ 3,900,000