Pension Plans and Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2018

Retirement Benefits [Abstract]

Defined Benefit Pension Plans and Postretirement Benefit Plans

	Third Quarter						Nine Months
	2018			2017			2018			2017
Service cost — benefits earned during the period (in millions)	$	2.7		$	2.7		$	8.1		$	8.1
Pension non-service income (in millions):
Interest cost on benefit obligation	$	8.2		$	9.1		$	24.5		$	27.4
Expected return on plan assets	(17.9		)	(18.3		)	(53.7		)	(54.9		)
Amortization of prior service cost	(1.5		)	(1.5		)	(4.5		)	(4.5		)
Amortization of net actuarial loss	7.8			7.3			23.6			21.9
Pension non-service income	$	(3.4	)	$	(3.4	)	$	(10.1	)	$	(10.1	)

Teledyne sponsors several postretirement defined benefit plans that provide health care and life insurance benefits for certain eligible retirees.

	Third Quarter						Nine Months
Postretirement benefits non-service (income)/expense (in millions):	2018			2017			2018			2017
Interest cost on benefit obligation	$	0.1		$	0.1		$	0.3		$	0.3
Amortization of net actuarial gain	(0.1		)	(0.1		)	(0.3		)	(0.3		)
Postretirement benefits non-service (income)/expense	$	—		$	—		$	—		$	—