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CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL (UNAUDITED) - USD ($) $ in Millions | Total | Limited Partner Common Unitholders Public | Limited Partner Common Unitholders Affiliate | Limited Partner Subordinated Unitholders Affiliate | Limited Partner Class A Shares | General Partner | Noncontrolling Interest | Accumulated Other Comprehensive Income | Net Parent Investment
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance, beginning of period at Dec. 31, 2018 |  | $ 1,876.1 | [1] | $ 357.1 | $ 39.5 | $ 105.3 |  | $ 14.9 | $ 2,194.1 | $ 1.2 | $ (836.0)
Net income |  | 80.8 | [1] | 5.3 | 3.4 | 8.6 |  | 0.8 | 77.2 |  | (14.5)
Equity-based compensation |  | 0.3 | [1] | 0.3 |  |  |  |  |  |  |
Distributions to unitholders |  | (20.2) | [1] | (6.3) | (3.8) | (10.1) |  |  |  |  |
Distributions to general partner |  |  |  |  |  |  |  | (0.6) |  |  | 0.6
Distributions to noncontrolling interest |  |  |  |  |  |  |  |  | (57.1) |  | 57.1
Contributions from noncontrolling interest |  |  |  |  |  |  |  |  | 55.5 |  | (55.5)
Other comprehensive income (loss) |  | (0.2) | [1] |  |  |  |  |  |  | (0.2) |
Acquisition of HessWater Services |  | (225.0) | [1] |  |  |  |  |  |  |  | (225.0)
Balance, end of period at Mar. 31, 2019 |  | 1,711.8 | [1] | 356.4 | 39.1 | 103.8 |  | 15.1 | 2,269.7 | 1.0 | (1,073.3)
Balance, beginning of period at Dec. 31, 2018 |  | 1,876.1 | [1] | 357.1 | 39.5 | 105.3 |  | 14.9 | 2,194.1 | 1.2 | (836.0)
Net income | [1] | 242.6 |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) | [1] | (0.6) |  |  |  |  |  |  |  |  |
Balance, end of period at Sep. 30, 2019 |  | 1,831.2 | [1] | 354.2 | 37.5 | 99.2 |  | 15.5 | 2,350.6 | 0.6 | (1,026.4)
Balance, beginning of period at Mar. 31, 2019 |  | 1,711.8 | [1] | 356.4 | 39.1 | 103.8 |  | 15.1 | 2,269.7 | 1.0 | (1,073.3)
Net income |  | 74.4 | [1] | 4.9 | 3.0 | 7.9 |  | 1.0 | 74.1 |  | (16.5)
Equity-based compensation |  | 0.3 | [1] | 0.3 |  |  |  |  |  |  |
Distributions to unitholders |  | (21.0) | [1] | (6.5) | (4.0) | (10.5) |  |  |  |  |
Distributions to general partner |  |  |  |  |  |  |  | (0.8) |  |  | 0.8
Distributions to noncontrolling interest |  |  |  |  |  |  |  |  | (49.0) |  | 49.0
Contributions from noncontrolling interest |  |  |  |  |  |  |  |  | 12.8 |  | (12.8)
Other comprehensive income (loss) |  | (0.2) | [1] |  |  |  |  |  |  | (0.2) |
Balance, end of period at Jun. 30, 2019 |  | 1,765.3 | [1] | 355.1 | 38.1 | 101.2 |  | 15.3 | 2,307.6 | 0.8 | (1,052.8)
Net income |  | 87.4 | [1] | 5.5 | 3.4 | 8.9 |  | 1.3 | 81.3 |  | (13.0)
Equity-based compensation |  | 0.5 | [1] | 0.5 |  |  |  |  |  |  |
Distributions to unitholders |  | (21.8) | [1] | (6.9) | (4.0) | (10.9) |  |  |  |  |
Distributions to general partner |  |  |  |  |  |  |  | (1.1) |  |  | 1.1
Distributions to noncontrolling interest |  |  |  |  |  |  |  |  | (46.3) |  | 46.3
Contributions from noncontrolling interest |  |  |  |  |  |  |  |  | 8.0 |  | (8.0)
Other comprehensive income (loss) |  | (0.2) | [1] |  |  |  |  |  |  | (0.2) |
Balance, end of period at Sep. 30, 2019 |  | 1,831.2 | [1] | $ 354.2 | $ 37.5 | $ 99.2 |  | $ 15.5 | 2,350.6 | 0.6 | $ (1,026.4)
Balance, beginning of period at Dec. 31, 2019 |  | 1,332.1 |  |  |  |  | $ 131.1 |  | 1,200.6 | 0.4 |
Net income |  | 129.0 |  |  |  |  | 6.5 |  | 122.5 |  |
Equity-based compensation |  | 0.5 |  |  |  |  | 0.5 |  |  |  |
Distributions to unitholders |  | (121.0) |  |  |  |  | (7.6) |  | (113.4) |  |
Other comprehensive income (loss) |  | (0.2) |  |  |  |  |  |  |  | (0.2) |
Balance, end of period at Mar. 31, 2020 |  | 1,340.4 |  |  |  |  | 130.5 |  | 1,209.7 | 0.2 |
Balance, beginning of period at Dec. 31, 2019 |  | 1,332.1 |  |  |  |  | 131.1 |  | 1,200.6 | 0.4 |
Net income |  | 352.6 |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) |  | (0.4) |  |  |  |  |  |  |  |  |
Balance, end of period at Sep. 30, 2020 |  | 1,319.2 |  |  |  |  | 126.2 |  | 1,193.0 |  |
Balance, beginning of period at Mar. 31, 2020 |  | 1,340.4 |  |  |  |  | 130.5 |  | 1,209.7 | 0.2 |
Net income |  | 107.8 |  |  |  |  | 5.3 |  | 102.5 |  |
Equity-based compensation |  | 0.3 |  |  |  |  | 0.3 |  |  |  |
Distributions to unitholders |  | (122.7) |  |  |  |  | (7.9) |  | (114.8) |  |
Other comprehensive income (loss) |  | (0.2) |  |  |  |  |  |  |  | $ (0.2) |
Acquisition of HessWater Services |  | 1.6 |  |  |  |  |  |  | 1.6 |  |
Balance, end of period at Jun. 30, 2020 |  | 1,327.2 |  |  |  |  | 128.2 |  | 1,199.0 |  |
Net income |  | 115.8 |  |  |  |  | 5.6 |  | 110.2 |  |
Equity-based compensation |  | 0.4 |  |  |  |  | 0.4 |  |  |  |
Distributions to unitholders |  | (124.2) |  |  |  |  | (8.0) |  | (116.2) |  |
Balance, end of period at Sep. 30, 2020 |  | $ 1,319.2 |  |  |  |  | $ 126.2 |  | $ 1,193.0 |  |
[1] | The financial information presented in this report has been retrospectively adjusted for the acquisition of Hess Infrastructure Partners LP.

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