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LONG-TERM DEBT - Schedule of Line of Credit Facilities (Details) - USD ($) | Dec. 31, 2021 | Dec. 31, 2020 | Apr. 10, 2020 | Jun. 08, 2018
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Letters of Credit Under Credit Agreement | $ (791,000,000) | $ (737,000,000) |  |
Revolving Credit Facility | 2018 Refinancing Credit Agreement |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum Availability | 1,200,000,000 |  |  |
Current Availability | 1,197,000,000 |  |  |
Line of Credit |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum Availability |  |  | $ 600,000,000 |
Line of Credit | Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum Availability |  |  | $ 144,000,000 |
Line of Credit | Revolving Credit Facility | 2018 Refinancing Credit Agreement |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum Availability |  |  |  | $ 1,200,000,000
Letters of Credit Under Credit Agreement | $ (3,000,000) |  |  |

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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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