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Long-Term Debt - Debt Maturities (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Debt Instrument [Line Items]  
2020 $ 0
2021 500
2022 400
2023 695
2024 650
Thereafter 5,134
Total 7,379
Noble Energy  
Debt Instrument [Line Items]  
2020 0
2021 0
2022 0
2023 100
2024 650
Thereafter 5,134
Total 5,884
Noble Midstream  
Debt Instrument [Line Items]  
2020 0
2021 500
2022 400
2023 595
2024 0
Thereafter 0
Total $ 1,495