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Revenue Recognition (Tables)
 9 Months Ended
Sep. 30, 2021
Revenue Recognition [Abstract]  
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
The following table summarizes our contract assets and contract liabilities (in millions):

September 30, 2021December 31, 2020
Contract assets (non-current)
$1.4 $1.0 
Contract liabilities (current)(1)
$10.8 $10.3 
Contract liabilities (non-current)(1)
$183.4 $172.2 

(1)During the three and nine months ended September 30, 2021, we recognized revenues of approximately $3.4 million and $9.8 million that were previously included in contract liabilities at December 31, 2020. The remaining change in our contract liabilities during the three and nine months ended September 30, 2021, related to capital reimbursements associated with our revenue contracts and revenue deferrals associated with our contracts with increasing (decreasing) rates.
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]
The following table summarizes the transaction price allocated to our remaining performance obligations under certain contracts that have not been recognized as of September 30, 2021 (in millions):
Remainder of 2021$23.3 
202275.4 
202352.6 
202431.7 
Total$183.0 
Disaggregation of Revenue
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 three and nine months ended September 30, 2021 and 2020 (in millions). 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 represents revenues related to our commodity-based derivatives.
Three Months Ended September 30, 2021
Gathering and Processing
Storage and Transportation
Marketing, Supply and Logistics
Intersegment Elimination
Total
Topic 606 revenues
Gathering
Natural gas
$35.3 $— $— $— $35.3 
Crude oil
17.1 — — — 17.1 
Water
24.8 — — — 24.8 
Processing
Natural gas
7.2 — — — 7.2 
Compression
Natural gas
3.7 — — — 3.7 
Storage
Crude oil
0.1 0.4 — (0.4)0.1 
NGLs
— — 2.6 — 2.6 
Pipeline
Crude oil
— 1.5 — (0.9)0.6 
Transportation
Crude oil
0.8 — — (0.1)0.7 
NGLs
— — 4.1 — 4.1 
Rail Loading
Crude oil
— 2.2 — (1.0)1.2 
Product Sales
Natural gas
42.9 — 84.5 (42.7)84.7 
Crude oil
105.4 — 331.3 (25.1)411.6 
NGLs
59.1 — 500.1 (57.6)501.6 
Other
— 0.2 0.4 (0.1)0.5 
Total Topic 606 revenues
296.4 4.3 923.0 (127.9)1,095.8 
Non-Topic 606 revenues
0.4 — 130.1 — 130.5 
Total revenues
$296.8 $4.3 $1,053.1 $(127.9)$1,226.3 
Three Months Ended September 30, 2020
Gathering and Processing
Storage and Transportation
Marketing, Supply and Logistics
Intersegment Elimination
Total
Topic 606 revenues
Gathering
Natural gas
$30.3 $— $— $— $30.3 
Crude oil
22.5 — — — 22.5 
Water
25.1 — — — 25.1 
Processing
Natural gas
6.1 — — — 6.1 
Compression
Natural gas
6.0 — — — 6.0 
Storage
Crude oil
0.1 0.8 — (0.3)0.6 
NGLs
— — 3.4 — 3.4 
Pipeline
Crude oil
— 1.7 — (0.6)1.1 
Transportation
Crude oil
1.2 — — — 1.2 
NGLs
— — 3.1 — 3.1 
Rail Loading
Crude oil
— 2.7 — (0.9)1.8 
Product Sales
Natural gas
13.0 — 22.3 (12.9)22.4 
Crude oil
69.4 — 162.9 (15.6)216.7 
NGLs
16.4 — 145.6 (16.4)145.6 
Other
— 0.2 0.3 (0.1)0.4 
Total Topic 606 revenues
190.1 5.4 337.6 (46.8)486.3 
Non-Topic 606 revenues
— — 32.9 — 32.9 
Total revenues
$190.1 $5.4 $370.5 $(46.8)$519.2 
Nine Months Ended September 30, 2021
Gathering and Processing
Storage and Transportation
Marketing, Supply and Logistics
Intersegment Elimination
Total
Topic 606 revenues
Gathering
Natural gas
$100.0 $— $— $— $100.0 
Crude oil
56.2 — — — 56.2 
Water
69.5 — — — 69.5 
Processing
Natural gas
21.5 — — — 21.5 
Compression
Natural gas
12.1 — — — 12.1 
Storage
Crude oil
0.3 1.9 — (1.8)0.4 
NGLs
— — 8.7 — 8.7 
Pipeline
Crude oil
— 4.5 — (2.5)2.0 
NGLs
— — 0.1 — 0.1 
Transportation
Crude oil
1.9 — — (0.1)1.8 
NGLs
— — 12.5 — 12.5 
Rail Loading
Crude oil
— 6.8 — (3.4)3.4 
Product Sales
Natural gas
112.5 — 224.4 (111.7)225.2 
Crude oil
297.1 — 926.9 (62.5)1,161.5 
NGLs
142.3 — 1,210.9 (140.5)1,212.7 
Other
— 0.6 1.2 (0.4)1.4 
Total Topic 606 revenues
813.4 13.8 2,384.7 (322.9)2,889.0 
Non-Topic 606 revenues
0.6 — 299.0 — 299.6 
Total revenues
$814.0 $13.8 $2,683.7 $(322.9)$3,188.6 
Nine Months Ended September 30, 2020
Gathering and Processing
Storage and Transportation
Marketing, Supply and Logistics
Intersegment Elimination
Total
Topic 606 revenues
Gathering
Natural gas
$107.3 $— $— $— $107.3 
Crude oil
66.9 — — — 66.9 
Water
66.4 — — — 66.4 
Processing
Natural gas
23.4 — — — 23.4 
Compression
Natural gas
18.0 — — — 18.0 
Storage
Crude oil
1.0 2.5 — (1.5)2.0 
NGLs
— — 8.6 — 8.6 
Pipeline
Crude oil
— 4.6 — (1.5)3.1 
NGLs
— — 0.2 — 0.2 
Transportation
Crude oil
4.7 — 1.9 — 6.6 
NGLs
— — 7.4 — 7.4 
Rail Loading
Crude oil
— 9.0 — (3.5)5.5 
Product Sales
Natural gas
31.9 — 56.1 (31.4)56.6 
Crude oil
225.3 — 515.1 (39.0)701.4 
NGLs
28.9 — 398.3 (28.6)398.6 
Other
— 0.9 1.0 (0.6)1.3 
Total Topic 606 revenues
573.8 17.0 988.6 (106.1)1,473.3 
Non-Topic 606 revenues
— — 126.5 — 126.5 
Total revenues
$573.8 $17.0 $1,115.1 $(106.1)$1,599.8