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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]  
Minimum rentals on operating leases [Table Text Block] Minimum non-cancelable operating lease commitments at December 31, 2018 were as follows (in millions):
 
2019
 
2020
 
2021
 
2022
 
2023
 
Thereafter
 
Total
Minimum rentals on operating leases
$
19

 
$
14

 
$
11

 
$
10

 
$
9

 
$
34

 
$
97
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
 
2020
 
2021
 
2022
 
2023
 
2024
 
Thereafter
 
Total
Operating lease
$
22

 
$
18

 
$
16

 
$
16

 
$
15

 
$
36

 
$
123

Less: Present value discount
 
 
 
 
 
 
 
 
 
 
 
 
13

   Total operating lease liabilities
 
 
 
 
 
 
 
 
 
 
 
 
$
110