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Pension Plans and Postretirement Benefits (Tables)
 3 Months Ended
Mar. 31, 2019
Retirement Benefits [Abstract]  
Defined Benefit Pension Plans and Postretirement Benefit Plans
 
First Quarter
 
2019
 
2018
Service cost — benefits earned during the period (in millions)
$
2.4

 
$
2.7

 
 
 
 
Pension non-service income (in millions):
 
 
 
Interest cost on benefit obligation
$
8.4

 
$
8.1

Expected return on plan assets
(16.5
)
 
(17.9
)
Amortization of prior service cost
(1.5
)
 
(1.5
)
Amortization of net actuarial loss
7.7

 
7.9

Curtailment/settlements
(0.3
)
 
—

Pension non-service income
$
(2.2
)
 
$
(3.4
)
Teledyne sponsors several postretirement defined benefit plans that provide health care and life insurance benefits for certain eligible retirees.
 
First Quarter
Postretirement benefits non-service (income)/expense (in millions):
2019
 
2018
Interest cost on benefit obligation
$
0.1

 
$
0.1

Amortization of net actuarial gain
—

 
(0.1
)
Postretirement benefits non-service (income)/expense
$
0.1

 
$
—