XML 44 R28.htm IDEA: XBRL DOCUMENT v3.10.0.1
Debt (Tables)
6 Months Ended
Jun. 30, 2018
Debt Disclosure [Abstract]  
Schedule of long-term debt instruments
Total debt consisted of the following:
(millions)
June 30,
2018
 
December 31,
2017
4.875% senior notes due 2027
$
500

 
$
500

5.5% senior notes due 2025
350

 
350

Industrial revenue bonds (due 2028 through 2034)
239

 
239

Total
1,089

 
1,089

Less: Unamortized debt issuance costs
11

 
11

Total
$
1,078

 
$
1,078

Other debt disclosure
OTHER INFORMATION
(millions)
June 30,
2018
 
December 31,
2017
Fair value of debt
$
1,115

 
$
1,134

Accrued interest
12

 
12