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Pension Plans and Postretirement Benefits
 6 Months Ended
Jun. 30, 2019
Retirement Benefits [Abstract]  
Pension Plans and Postretirement Benefits Pension Plans and Postretirement Benefits
For the domestic pension plans, the discount rate increased to 4.59% in 2019 compared with a 4.02% discount rate used in 2018. Teledyne has not made any cash pension contributions to its domestic qualified pension plan since 2013. No cash pension contributions are planned for 2019 for the domestic qualified pension plan.
 
Second Quarter
 
Six Months
 
2019
 
2018
 
2019
 
2018
Service cost — benefits earned during the period (in millions)
$
2.3

 
$
2.7

 
$
4.7

 
$
5.4

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

 
$
8.2

 
$
16.8

 
$
16.3

Expected return on plan assets
(16.6
)
 
(17.9
)
 
(33.1
)
 
(35.8
)
Amortization of prior service cost
(1.5
)
 
(1.5
)
 
(3.0
)
 
(3.0
)
Amortization of net actuarial loss
7.8

 
7.9

 
15.5

 
15.8

Curtailment/settlements
(0.1
)
 
—

 
(0.4
)
 
—

Pension non-service income
$
(2.0
)
 
$
(3.3
)
 
$
(4.2
)
 
$
(6.7
)
Teledyne sponsors several postretirement defined benefit plans that provide health care and life insurance benefits for certain eligible retirees.
 
Second Quarter
 
Six Months
Postretirement benefits non-service (income)/expense (in millions):
2019
 
2018
 
2019
 
2018
Interest cost on benefit obligation
$
0.1

 
$
0.1

 
$
0.2

 
$
0.2

Amortization of net actuarial gain
(0.1
)
 
(0.1
)
 
(0.1
)
 
(0.2
)
Postretirement benefits non-service (income)/expense
$
—

 
$
—

 
$
0.1

 
$
—