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DEBT DEBT (Tables)

3 Months Ended

Mar. 31, 2020

Debt Instrument [Line Items]

Debt [Table Text Block]

The following table sets forth our consolidated debt for the periods indicated:

		March 31, 2020				December 31, 2019
		(Thousands of dollars)
Commercial paper outstanding, bearing a weighted-average interest rate of 2.16% as of December 31, 2019		$	—			$	220,000
Senior unsecured obligations:
$1,500,000 term loan, variable rate, due November 2021		1,250,000				1,250,000
$700,000 at 4.25% due February 2022		547,397				547,397
$900,000 at 3.375% due October 2022		900,000				900,000
$425,000 at 5.0% due September 2023		425,000				425,000
$500,000 at 7.5% due September 2023		500,000				500,000
$500,000 at 2.75% due September 2024		500,000				500,000
$500,000 at 4.9% due March 2025		500,000				500,000
$400,000 at 2.2% due September 2025		397,000				—
$500,000 at 4.0% due July 2027		500,000				500,000
$800,000 at 4.55% due July 2028		800,000				800,000
$100,000 at 6.875% due September 2028		100,000				100,000
$700,000 at 4.35% due March 2029		700,000				700,000
$750,000 at 3.4% due September 2029		734,251				750,000
$850,000 at 3.1% due March 2030		821,050				—
$400,000 at 6.0% due June 2035		400,000				400,000
$600,000 at 6.65% due October 2036		600,000				600,000
$600,000 at 6.85% due October 2037		600,000				600,000
$650,000 at 6.125% due February 2041		650,000				650,000
$400,000 at 6.2% due September 2043		400,000				400,000
$700,000 at 4.95% due July 2047		693,405				700,000
$1,000,000 at 5.2% due July 2048		1,000,000				1,000,000
$750,000 at 4.45% due September 2049		747,650				750,000
$500,000 at 4.5% due March 2050		489,625				—
Guardian Pipeline
Weighted average 7.85% due December 2022		19,395				21,307
Total debt		14,274,773				12,813,704
Unamortized portion of terminated swaps		14,603				15,032
Unamortized debt issuance costs and discounts		(135,076		)		(121,329		)
Current maturities of long-term debt		(7,650		)		(7,650		)
Short-term borrowings (a)		—				(220,000		)
Long-term debt		$	14,146,650			$	12,479,757

(a) - Individual issuances of commercial paper under our commercial paper program generally mature in 90 days or less.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation.

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