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Goodwill and Intangible Assets - Amortization Expense (Details) - EnLink Midstream Partners, LP
$ in Millions
Dec. 31, 2021
USD ($)
Finite-Lived Intangible Assets [Line Items]  
2022 $ 127.6
2023 127.6
2024 127.6
2025 110.3
2026 106.4
Thereafter 450.2
Total $ 1,049.7