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Pension and Other Postretirement Benefits (Tables)
6 Months Ended
Jun. 30, 2020
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs [Table Text Block] The components of net periodic pension and retiree medical cost were as follows (in millions):
 
 
Three Months Ended
 
Six Months Ended
 
April 11 - June 30, 2019
 
 
June 30, 2020
 
Service cost (1)
 
$
.7

 
$
1.3

 
$
.4

Interest cost (2)
 
6.4

 
12.9

 
6.5

Expected return on plan assets (2)
 
(9.5
)
 
(19.0
)
 
(8.2
)
Net periodic pension and retiree medical cost (income)
 
$
(2.4
)

$
(4.8
)
 
$
(1.3
)

(1) 
Included in contract drilling and general and administrative expense in our condensed consolidated statements of operations.

(2) 
Included in other, net, in our condensed consolidated statements of operations.