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Debt and Capital Leases (Tables)
12 Months Ended
Dec. 31, 2018
Debt Disclosure [Abstract]  
Annual Contractual Maturities of Principal on Debt Outstanding
Annual contractual maturities of outstanding principal on the term loan at December 31, 2018, are as follows: 
In millions
 
2019
$
19

2020
25

2021
44

2022
87

2023
325

Total
$
500

Interest Expense on Borrowings
The following table presents interest expense on borrowings for the years ended December 31:
In millions
2018
 
2017
 
2016
Interest expense on term loan and credit facility
$
21

 
$
15

 
$
12

Interest expense on capital leases
$
1

 
$

 
$

Schedule of Future Minimum Lease Payments for Capital Leases
Future minimum lease payments under capital leases at December 31, 2018, were:
In millions
 
2019
$
19

2020
18

2021
13

Total
50

Amount representing interest
(3
)
Present value of minimum lease payments
$
47