Employee Benefit Plans (Tables)

6 Months Ended

Mar. 31, 2018

Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]

Net Periodic Benefit Costs

Net periodic benefit costs for our defined benefit pension plans are as follows:

	Three Months Ended						Six Months Ended
	March 31, 2018			April 1, 2017			March 31, 2018			April 1, 2017
U.S. Plans
Service cost	$	5,633		$	6,021		$	11,267		$	12,043
Interest cost	8,073			7,635			16,146			15,271
Expected return on plan assets	(13,575		)	(13,627		)	(27,151		)	(27,255		)
Amortization of prior service cost (credit)	47			47			94			94
Amortization of actuarial loss	6,902			8,419			13,804			16,838
Pension expense for U.S. defined benefit plans	$	7,080		$	8,495		$	14,160		$	16,991
Non-U.S. Plans
Service cost	$	1,519		$	1,514		$	2,989		$	3,046
Interest cost	1,092			746			2,147			1,497
Expected return on plan assets	(1,290		)	(1,122		)	(2,533		)	(2,253		)
Amortization of prior service cost (credit)	(15		)	(27		)	(29		)	(54		)
Amortization of actuarial loss	648			1,109			1,272			2,229
Pension expense for non-U.S. defined benefit plans	$	1,954		$	2,220		$	3,846		$	4,465

Defined Contribution Plan Disclosures

Pension expense for our defined contribution plans consists of:

	Three Months Ended				Six Months Ended
	March 31, 2018		April 1, 2017		March 31, 2018		April 1, 2017
U.S. defined contribution plans	$	4,136	$	3,586	$	8,108	$	7,256
Non-U.S. defined contribution plans	1,550		1,472		3,259		2,832
Total pension expense for defined contribution plans	$	5,686	$	5,058	$	11,367	$	10,088