XML 52 R39.htm IDEA: XBRL DOCUMENT v3.10.0.1
Long-Term Debt (Tables)
 12 Months Ended
Dec. 31, 2018
Debt Disclosure [Abstract]  
Schedule Of Long-Term Debt
Long-term debt consisted of the following at December 31:
 
 
December 31, 2018
 
December 31, 2017
 
 
Principal Amount
 
Unamortized Discount and Debt Issuance Costs
 
Net Long-Term Debt
 
Principal Amount
 
Unamortized Premium, Discount and Debt Issuance Costs
 
Net Long-Term Debt
3.60% senior notes due 2022 (the "3.60% 2022 Senior Notes")
 
$
250

 
$
(1
)
 
$
249

 
$
250

 
$
(1
)
 
$
249

3.60% senior notes due 2026 (the "3.60% 2026 Senior Notes")
 
750

 
(9
)
 
741

 
750

 
(10
)
 
740

Loan related to tax-exempt waste disposal revenue bonds due 2027
 
11

 
—

 
11

 
11

 
—

 
11

6 ½% senior notes due 2029 (the "6 ½% 2029 GO Zone Senior Notes")
 
100

 
(1
)
 
99

 
100

 
(1
)
 
99

6 ½% senior notes due 2035 (the "6 ½% 2035 GO Zone Senior Notes")
 
89

 
(1
)
 
88

 
89

 
(1
)
 
88

6 ½% senior notes due 2035 (the "6 ½% 2035 IKE Zone Senior Notes")
 
65

 
—

 
65

 
65

 
—

 
65

5.0% senior notes due 2046 (the "5.0% 2046 Senior Notes")
 
700

 
(24
)
 
676

 
700

 
(25
)
 
675

4.375% senior notes due 2047 (the "4.375% 2047 Senior Notes")
 
500

 
(9
)
 
491

 
500

 
(9
)
 
491

3.50% senior notes due 2032 (the "3.50% 2032 GO Zone Refunding Senior Notes")
 
250

 
(2
)
 
248

 
250

 
(2
)
 
248

4.625% senior notes due 2021 (the "4.625% Westlake 2021 Senior Notes")
 
—

 
—

 
—

 
625

 
20

 
645

4.625% senior notes due 2021(the "4.625% Subsidiary 2021 Senior Notes")
 
—

 
—

 
—

 
63

 
2

 
65

4.875% senior notes due 2023 (the "4.875% Westlake 2023 Senior Notes")
 
—

 
—

 
—

 
434

 
11

 
445

4.875% senior notes due 2023 (the "4.875% Subsidiary 2023 Senior Notes")
 
—

 
—

 
—

 
16

 
—

 
16

Total Long-term debt
 
2,715

 
(47
)
 
2,668

 
3,853

 
(16
)
 
3,837

Less:
 
 
 
 
 
 
 
 
 
 
 
 
Current portion - 4.625% Westlake 2021 Senior Notes and 4.625% Subsidiary 2021 Senior Notes
 
—

 
—

 
—

 
688

 
22

 
710

Long-term debt, net of current portion
 
$
2,715

 
$
(47
)
 
$
2,668

 
$
3,165

 
$
(38
)
 
$
3,127