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Revenues
 12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Revenue from Contract with Customer [Text Block] Revenues
Contract Assets and Contract Liabilities

Our contract assets and contract liabilities are reported in a net position on a contract-by-contract basis at the end of each reporting period. Our receivables related to our revenue contracts accounted for under Topic 606 totaled $331.0 million and $219.9 million at December 31, 2021 and 2020, and are included in accounts receivable on our consolidated balance sheets. Our contract assets are included in other non-current assets on our consolidated balance sheets. Our contract liabilities primarily consist of current and non-current deferred revenues. On our consolidated balance sheets, our current deferred revenues are included in accrued expenses and other liabilities and our non-current deferred revenues are included in other long-term liabilities. The majority of revenues associated with our deferred revenues is expected to be recognized as the performance obligations under the related contracts are satisfied over the next 15 years.

The following table summarizes our contract assets and contract liabilities (in millions):
December 31,

20212020
Contract assets (non-current)
$1.3 $1.0 
Contract liabilities (current)(1)
$10.7 $10.3 
Contract liabilities (non-current)(1)
$187.1 $172.2 

(1)During the year ended December 31, 2021, we recognized revenues of approximately $14.0 million that were previously included in contract liabilities at December 31, 2020. The remaining change in our contract liabilities during the year ended December 31, 2021 related to capital reimbursements associated with our revenue contracts and revenue deferrals associated with our contracts with increasing (decreasing) rates.

The following table summarizes the transaction price allocated to our remaining performance obligations under certain contracts that have not been recognized as of December 31, 2021 (in millions):
2022$72.7 
202352.6 
202431.7 
20250.1 
Total$157.1 

Our remaining performance obligations presented in the table above exclude estimates of variable rate escalation clauses in our contracts with customers, and is generally limited to fixed-fee and percentage-of-proceeds service contracts which have fixed pricing and minimum volume terms and conditions. Our remaining performance obligations generally exclude, based on the following practical expedients that we elected to apply, disclosures for (i) variable consideration allocated to a wholly-unsatisfied promise to transfer a distinct service that forms part of the identified single performance obligation; (ii) unsatisfied performance obligations where the contract term is one year or less; and (iii) contracts for which we recognize revenues as amounts are invoiced.

Disaggregation of Revenues

The following tables summarize our revenues from contracts with customers disaggregated by type of product/service sold and by commodity type for each of our segments for the years ended December 31, 2021, 2020 and 2019 (in millions). In addition, the revenues from contracts with customers are presented in the three operating and reporting segments that are further discussed in Note 16 for all periods presented. We believe this summary best depicts how the nature, amount, timing and uncertainty of our revenues and cash flows are affected by economic factors. Our non-Topic 606 revenues presented in the tables below primarily represent revenues related to our commodity-based derivatives.
Year Ended December 31, 2021
Gathering and Processing North
Gathering and Processing South
Storage and Logistics
Intersegment Elimination
Total
Topic 606 revenues
Gathering
Natural gas
$56.3 $83.2 $— $— $139.5 
Crude oil
73.1 — — — 73.1 
Water
94.0 — — — 94.0 
Processing
Natural gas
24.4 5.0 — — 29.4 
Compression
Natural gas
— 17.1 — — 17.1 
Storage
Crude oil
0.3 — 0.5 (0.3)0.5 
NGLs
— — 11.5 — 11.5 
Pipeline
Crude oil
— — 2.6 — 2.6 
NGLs
— — 0.2 — 0.2 
Transportation
Crude oil
2.7 — — (0.1)2.6 
NGLs
— — 17.3 — 17.3 
Rail Loading
Crude oil
— — 4.6 — 4.6 
Product Sales
Natural gas
171.4 0.6 326.2 (171.1)327.1 
Crude oil
401.5 — 1,237.7 (82.6)1,556.6 
NGLs
209.4 — 1,796.6 (205.2)1,800.8 
Other
— — 1.7 — 1.7 
Total Topic 606 revenues
1,033.1 105.9 3,398.9 (459.3)4,078.6 
Non-Topic 606 revenues
0.9 — 489.5 — 490.4 
Total revenues
$1,034.0 $105.9 $3,888.4 $(459.3)$4,569.0 
Year Ended December 31, 2020
Gathering and Processing North
Gathering and Processing South
Storage and Logistics
Intersegment Elimination
Total
Topic 606 revenues
Gathering
Natural gas
$53.4 $87.2 $— $— $140.6 
Crude oil
95.3 — — — 95.3 
Water
92.6 — — — 92.6 
Processing
Natural gas
22.4 9.5 — — 31.9 
Compression
Natural gas
— 23.9 — — 23.9 
Storage
Crude oil
1.1 — 1.9 (0.3)2.7 
NGLs
— — 13.1 — 13.1 
Pipeline
Crude oil
— — 4.1 — 4.1 
NGLs
— — 0.3 — 0.3 
Transportation
Crude oil
6.2 — 1.9 (0.1)8.0 
NGLs
— — 10.9 — 10.9 
Rail Loading
Crude oil
— — 7.4 — 7.4 
Product Sales
Natural gas
53.7 (0.3)90.9 (52.8)91.5 
Crude oil
292.2 — 660.7 (53.0)899.9 
NGLs
54.0 — 614.2 (53.6)614.6 
Other
— — 1.5 — 1.5 
Total Topic 606 revenues
670.9 120.3 1,406.9 (159.8)2,038.3 
Non-Topic 606 revenues
— — 216.0 — 216.0 
Total revenues
670.9 120.3 1,622.9 (159.8)2,254.3 
Year Ended December 31, 2019
Gathering and Processing North
Gathering and Processing South
Storage and Logistics
Intersegment Elimination
Total
Topic 606 revenues
Gathering
Natural gas
$51.2 $112.0 $— $— $163.2 
Crude oil
75.0 — — — 75.0 
Water
79.6 — — — 79.6 
Processing
Natural gas
18.9 10.0 — — 28.9 
NGLs
— — — — — 
Compression
Natural gas
— 24.9 — — 24.9 
Storage
Crude oil
1.9 — 3.5 (0.4)5.0 
NGLs
— — 6.3 — 6.3 
Pipeline
Crude oil
— — 5.2 — 5.2 
Transportation
Crude oil
7.0 — 5.8 (0.1)12.7 
NGLs
— — 11.7 — 11.7 
Water
— — 0.2 — 0.2 
Rail Loading
Crude oil
— — 11.0 — 11.0 
Product Sales
Natural gas
55.6 1.2 72.3 (33.4)95.7 
Crude oil
532.1 — 1,315.6 (121.1)1,726.6 
NGLs
40.5 0.9 659.3 (20.0)680.7 
Other
— — 1.9 — 1.9 
Total Topic 606 revenues
861.8 149.0 2,092.8 (175.0)2,928.6 
Non-Topic 606 revenues
— — 253.3 — 253.3 
Total revenues
$861.8 $149.0 $2,346.1 $(175.0)$3,181.9