DEBT Narrative (Details) - USD ($) $ in Thousands |
1 Months Ended | 6 Months Ended | |||||
|---|---|---|---|---|---|---|---|
Feb. 28, 2018 |
Jun. 30, 2018 |
Dec. 28, 2018 |
Apr. 15, 2018 |
Mar. 31, 2018 |
Jan. 15, 2018 |
Dec. 31, 2017 |
|
| Debt Instrument [Line Items] | |||||||
| Long-term debt | $ 3,380,366 | $ 3,613,059 | |||||
| Logistics revolving credit agreement [Member] | |||||||
| Debt Instrument [Line Items] | |||||||
| Maximum borrowing capacity | $ 1,575,000 | $ 1,750,000 | |||||
| Covenant terms | a consolidated interest coverage ratio (as defined in the Revolving Credit Agreement), which must not be less than 1.75-to-1.00 for each rolling period of four quarters, beginning with the rolling period ending June 30, 2018; the maximum allowed consolidated debt coverage ratio (as defined in the Revolving Credit Agreement) to 5.25-to-1.00 for the rolling periods ending June 30, 2018 through December 31, 2018. For any rolling periods ending on or after March 31, 2019, the maximum allowed consolidated debt coverage ratio may not exceed 5.00-to-1.00. | ||||||
| Current remaining borrowing capacity | $ 553,700 | ||||||
| Interest rate increase | 0.25% | ||||||
| Interest rate at period end - Revolving Credit Agreement | 3.90% | ||||||
| Long-term debt | $ 1,000,000 | ||||||
| Logistics Notes due 2018 [Member] | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate increase | 0.25% | ||||||
| Long-term debt | $ 350,000 | ||||||
| Stated interest rate | 7.65% | ||||||
| Interest rate at period end | 8.65% | ||||||
| Logisitics Notes due 2043 [Member] | |||||||
| Debt Instrument [Line Items] | |||||||
| Long-term debt | $ 402,500 | ||||||
| Stated interest rate | 7.625% | ||||||
| Interest rate at period end | 9.10% | ||||||
| Interest rate terms | an annual rate equal to the sum of the three-month LIBOR for the related quarterly interest period, plus 6.734% payable quarterly, commencing with the interest payment due April 15, 2018. | ||||||
| Receivables Financing Agreement [Member] | |||||||
| Debt Instrument [Line Items] | |||||||
| Maximum borrowing capacity | $ 125,000 | ||||||
| Long-term debt | $ 56,400 | ||||||
| Weighted average interest rate | 3.00% | ||||||
| Collateral amount | $ 103,200 | ||||||
| Scenario, Forecast [Member] | Logistics revolving credit agreement [Member] | |||||||
| Debt Instrument [Line Items] | |||||||
| Maximum borrowing capacity | $ 1,400,000 |