XML 60 R40.htm IDEA: XBRL DOCUMENT v3.8.0.1
Long-Term Debt (Tables)
 12 Months Ended
Dec. 31, 2017
Debt Disclosure [Abstract]  
Schedule Of Long-Term Debt
Long-term debt consisted of the following at December 31:
 
 
December 31, 2017
 
December 31, 2016
 
 
Principal Amount
 
Unamortized Premium, Discount and Debt Issuance Costs
 
Net Long-Term Debt
 
Principal Amount
 
Unamortized Premium, Discount and Debt Issuance Costs
 
Net Long-Term Debt
Revolving credit facility
 
$
—

 
$
—

 
$
—

 
$
325

 
$
—

 
$
325

4.625% senior notes due 2021 (the
   "4.625% Westlake 2021 Senior Notes")
 
625

 
20

 
645

 
625

 
27

 
652

4.625% senior notes due 2021
   (the "4.625% Subsidiary 2021 Senior
   Notes")
 
63

 
2

 
65

 
63

 
3

 
66

3.60% senior notes due 2022 (the "3.60%
   2022 Senior Notes")
 
250

 
(1
)
 
249

 
250

 
(2
)
 
248

4.875% senior notes due 2023 (the
   "4.875% Westlake 2023 Senior Notes")
 
434

 
11

 
445

 
434

 
13

 
447

4.875% senior notes due 2023
   (the "4.875% Subsidiary 2023 Senior
   Notes")
 
16

 
—

 
16

 
16

 
1

 
17

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

 
(10
)
 
740

 
750

 
(11
)
 
739

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 ¾% senior notes due 2032 (the "6 ¾%
   2032 GO Zone Senior Notes")
 
—

 
—

 
—

 
250

 
(2
)
 
248

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

 
(25
)
 
675

 
700

 
(26
)
 
674

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

 
(9
)
 
491

 
—

 
—

 
—

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

 
(2
)
 
248

 
—

 
—

 
—

Total long-term debt
 
3,853

 
(16
)
 
3,837

 
3,678

 
1

 
3,679

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
 
$
3,165

 
$
(38
)
 
$
3,127

 
$
3,678

 
$
1

 
$
3,679