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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Schedule Of Carrying And Fair Values Of Long-Term Debt

The carrying and fair values of the Company's long-term debt at December 31, 2020 and 2019 are summarized in the table below. The Company's long-term debt instruments are publicly-traded. A market approach, based upon quotes from financial reporting services, is used to measure the fair value of the Company's long-term debt. Because the Company's long-term debt instruments may not be actively traded, the inputs used to measure the fair value of the Company's long-term debt are classified as Level 2 inputs within the fair value hierarchy.

						2020												2019
						Carrying Value						Fair Value						Carrying Value						Fair Value
3.60% 2022 Senior Notes						$	249					$	259					$	249					$	255
3.60% 2026 Senior Notes						744						846						742						777
Loan related to tax-exempt waste disposal revenue bonds due 2027						11						11						11						11
1.625% 2029 Senior Notes						849						897						774						785
6 ½% 2029 GO Zone Senior Notes						—						—						99						103
3.375% 2030 Senior Notes						296						332						—						—
3.50% 2032 GO Zone Refunding Senior Notes						249						276						249						267
6 ½% 2035 GO Zone Senior Notes						—						—						88						92
6 ½% 2035 IKE Zone Senior Notes						—						—						65						68
5.0% 2046 Senior Notes						677						905						677						761
4.375% 2047 Senior Notes						491						597						491						505

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- Definition

Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13467-108611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- References

No definition available.

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