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Long-Term Debt - Narrative (Details) - USD ($) |  | 1 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Aug. 08, 2019 | Sep. 30, 2019 | Aug. 07, 2019 | Jun. 04, 2019 | Jun. 03, 2019
Revolving Credit Facility |  |  |  |  |
Long-term Debt |  |  |  |  |
Revolving credit facility, maximum borrowing capacity |  |  | $ 3,000,000,000.0 |  |
Anadarko |  |  |  |  |
Long-term Debt |  |  |  |  |
Debt issuance, face amount | $ 21,800,000,000 |  |  |  |
Term loan balance | 11,900,000,000 |  |  |  |
Anadarko | Revolving Credit Facility |  |  |  |  |
Long-term Debt |  |  |  |  |
Revolving credit facility balance | 2,900,000,000 |  |  |  |
Revolving credit facility, maximum borrowing capacity |  |  |  | $ 5,000,000,000.0 | $ 3,000,000,000.0
Senior Notes | Anadarko |  |  |  |  |
Long-term Debt |  |  |  |  |
Debt issuance, face amount | 13,000,000,000.0 |  |  |  |
Term loan balance | 11,900,000,000 |  |  |  |
Percentage of Anadarko debt tendered and exchanged |  | 97.00% |  |  |
Amount tendered and exchanged |  | $ 11,500,000,000 |  |  |
Amount not tendered and exchanged |  | 400,000,000 |  |  |
Senior Notes | Zero Coupon senior notes due 2036 |  |  |  |  |
Long-term Debt |  |  |  |  |
Debt issuance, face amount |  | $ 2,300,000,000 |  |  |
Interest rate |  | 5.24% |  |  |
Repurchase amount if put in whole |  | $ 992,000,000 |  |  |
Line of Credit | 364-Day Senior Unsecured Term Loan Facility | Anadarko |  |  |  |  |
Long-term Debt |  |  |  |  |
Debt issuance, face amount | $ 4,400,000,000 |  |  |  |
Debt instrument term | 364 days |  |  |  |
Line of Credit | Term Loan Facility | Anadarko |  |  |  |  |
Long-term Debt |  |  |  |  |
Debt issuance, face amount | $ 4,400,000,000 |  |  |  |
Debt instrument term | 2 years |  |  |  |
The Term Loans |  |  |  |  |
Long-term Debt |  |  |  |  |
Pay down of term loans |  | 4,800,000,000 |  |  |
The Term Loans | Anadarko |  |  |  |  |
Long-term Debt |  |  |  |  |
Debt issuance, face amount | $ 8,800,000,000 |  |  |  |
WES |  |  |  |  |
Long-term Debt |  |  |  |  |
Term loan balance | $ 4,600,000,000 |  |  |  |
WES | Senior Notes |  |  |  |  |
Long-term Debt |  |  |  |  |
Term loan balance |  | 4,600,000,000 |  |  |
WES | Line of Credit |  |  |  |  |
Long-term Debt |  |  |  |  |
Revolving credit facility balance |  | 160,000,000 |  |  |
WES | Line of Credit | Revolving Credit Facility |  |  |  |  |
Long-term Debt |  |  |  |  |
Revolving credit facility, maximum borrowing capacity |  | 2,000,000,000.0 |  |  |
WES | The Term Loans |  |  |  |  |
Long-term Debt |  |  |  |  |
Term loan balance |  | 3,000,000,000.0 |  |  |
Exclusion for debt offering proceeds |  | 1,000,000,000.0 |  |  |
Proceeds from Issuance of Secured Debt |  | $ 1,000,000,000.0 |  |  |

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + 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(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: 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(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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