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v3.20.4

Segment Information - Other Financial Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Other financial information [Abstract] |  |  |  |
Total assets |  | $ 15,875.7 | $ 18,815.1 |
Goodwill |  | 45.2 | 45.2 | $ 46.6
Operating Segments [Member] |  |  |  |
Other financial information [Abstract] |  |  |  |
Total assets | [1] | 15,875.7 | 18,815.1 | 16,938.2
Goodwill |  | 45.2 | 45.2 | 46.6
Capital expenditures |  | 726.8 | 2,708.5 | 3,327.7
Operating Segments [Member] | Gathering and Processing [Member] |  |  |  |
Other financial information [Abstract] |  |  |  |
Total assets | [1] | 8,743.5 | 11,929.8 | 11,602.7
Goodwill |  | 45.2 | 45.2 | 46.6
Capital expenditures |  | 293.9 | 1,273.3 | 1,548.6
Operating Segments [Member] | Logistics and Transportation [Member] |  |  |  |
Other financial information [Abstract] |  |  |  |
Total assets | [1] | 6,860.0 | 6,741.8 | 5,180.6
Capital expenditures |  | 414.0 | 1,412.2 | 1,767.0
Operating Segments [Member] | Other [Member] |  |  |  |
Other financial information [Abstract] |  |  |  |
Total assets | [1] | 86.3 | 1.0 | 3.2
Operating Segments [Member] | Corporate and Eliminations [Member] |  |  |  |
Other financial information [Abstract] |  |  |  |
Total assets | [1] | 185.9 | 142.5 | 151.7
Capital expenditures |  | $ 18.9 | $ 23.0 | $ 12.1
[1] | Assets in the Corporate and Eliminations column primarily include tax-related assets, cash, prepaids and debt issuance costs for our revolving credit facilities.

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