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SEGMENT INFORMATION - Operating Segments (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of operating segments [line items]      
Revenues $ 11,537 $ 8,885 $ 6,597
Direct operating costs [1] (8,247) (6,548) (4,609)
Cost of sales, less depreciation and amortization (6,211) (4,843) (3,395)
General and administrative costs (406) (312) (279)
Other (expense) income (210) (87) (28)
Interest expense (1,468) (1,179) (904)
Depreciation and amortization (2,036) (1,705) (1,214)
Deferred taxes (240) (54) (28)
Mark-to-market on hedging items and other 1,665 68 (323)
Share of earnings from associates 88 131 224
Net income attributable to non-controlling interest (1,626) (510) (417)
Net income (loss) attributable to partnership 1,093 394 233
Utilities      
Disclosure of operating segments [line items]      
Revenues 4,622 4,083 4,265
Transport      
Disclosure of operating segments [line items]      
Revenues 3,497 3,449 1,617
Midstream      
Disclosure of operating segments [line items]      
Revenues 1,829 643 399
Data      
Disclosure of operating segments [line items]      
Revenues 1,589 710 316
Operating segments      
Disclosure of operating segments [line items]      
Revenues 5,411 4,098 3,873
Direct operating costs (2,554) (1,793) (1,695)
General and administrative costs (406) (312) (279)
Other (expense) income 37 84 70
Interest expense (755) (623) (585)
FFO 1,733 1,454 1,384
Depreciation and amortization (1,144) (1,034) (895)
Deferred taxes (168) 3 (77)
Mark-to-market on hedging items and other 672 (29) (179)
Share of earnings from associates 0 0 0
Net income attributable to non-controlling interest 0 0 0
Net income (loss) attributable to partnership 1,093 394 233
Operating segments | Utilities      
Disclosure of operating segments [line items]      
Revenues 1,623 1,434 1,432
Direct operating costs (681) (580) (582)
General and administrative costs 0 0 0
Other (expense) income (64) (43) (31)
Interest expense (173) (152) (147)
FFO 705 659 672
Operating segments | Transport      
Disclosure of operating segments [line items]      
Revenues 2,062 1,573 1,614
Direct operating costs (1,094) (767) (781)
General and administrative costs 0 0 0
Other (expense) income (8) (2) (3)
Interest expense (259) (214) (227)
FFO 701 590 603
Operating segments | Midstream      
Disclosure of operating segments [line items]      
Revenues 1,101 572 491
Direct operating costs (489) (193) (171)
General and administrative costs 0 0 0
Other (expense) income (4) 3 10
Interest expense (116) (93) (86)
FFO 492 289 244
Operating segments | Data      
Disclosure of operating segments [line items]      
Revenues 625 519 336
Direct operating costs (290) (253) (161)
General and administrative costs 0 0 0
Other (expense) income 7 (1) 3
Interest expense (104) (69) (42)
FFO 238 196 136
Operating segments | Corporate      
Disclosure of operating segments [line items]      
Revenues 0 0 0
Direct operating costs 0 0 0
General and administrative costs (406) (312) (279)
Other (expense) income 106 127 91
Interest expense (103) (95) (83)
FFO (403) (280) (271)
Contribution from investments in associates      
Disclosure of operating segments [line items]      
Revenues (1,976) (1,379) (1,424)
Direct operating costs 964 600 649
General and administrative costs 0 0 0
Other (expense) income 9 17 11
Interest expense 258 177 173
Depreciation and amortization 480 471 399
Deferred taxes (10) (65) 52
Mark-to-market on hedging items and other 187 48 (84)
Share of earnings from associates 88 131 224
Net income attributable to non-controlling interest 0 0 0
Net income (loss) attributable to partnership 0 0 0
Attributable to non- controlling interest      
Disclosure of operating segments [line items]      
Revenues 8,102 6,166 4,148
Direct operating costs (4,621) (3,650) (2,349)
General and administrative costs 0 0 0
Other (expense) income (256) (188) (109)
Interest expense (971) (733) (492)
Depreciation and amortization (1,372) (1,142) (718)
Deferred taxes (62) 8 (3)
Mark-to-market on hedging items and other 806 49 (60)
Share of earnings from associates 0 0 0
Net income attributable to non-controlling interest (1,626) (510) (417)
Net income (loss) attributable to partnership $ 0 $ 0 $ 0
[1] During the fourth quarter of 2021, the partnership reclassified $2,036 million of depreciation and amortization expenses, which were previously presented as a separate line item, to direct operating costs. Prior period amounts were also adjusted to reflect this change, which resulted in an increase to direct operating costs by $1,705 million and $1,214 million for years ended December 31, 2020 and 2019, respectively, with equal and offsetting decreases to depreciation and amortization expense. This reclassification had no impact on revenues, net income, or basic and diluted earnings per limited partner unit.