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PARTNERSHIP CAPITAL (Tables)
 12 Months Ended
Dec. 31, 2021
Equity [abstract]  
Disclosure of classes of share capital Special and Limited Partnership Capital
 Special General
Partner Units		Limited
Partnership Units		Total
UNITS MILLIONS202120202019202120202019202120202019
Opening balance1.6 1.6 1.6 295.4 293.5 277.3 297.0 295.1 278.9 
Issued for cash— — — 9.7 0.2 13.8 9.7 0.2 13.8 
Conversion from Exchange LP Units— — — 0.1 0.3 3.2 0.1 0.3 3.2 
Conversion from BIPC exchangeable shares— — — 0.1 1.4 — 0.1 1.4 — 
Repurchased and cancelled— — — — — (0.8)— — (0.8)
Ending balance1.6 1.6 1.6 305.3 295.4 293.5 306.9 297.0 295.1 
 Special General PartnerLimited PartnersTotal
US$ MILLIONS202120202019202120202019202120202019
Opening balance$19 $19 $19 $5,526 $5,495 $4,911 $5,545 $5,514 $4,930 
Unit issuance— — — 545 9 559 545 9 559 
Conversion from Exchange LP Units— — — 2 3 53 2 3 53 
Conversion from BIPC exchangeable shares
— — — 1 19 — 1 19 — 
Repurchased and cancelled— — — — — (28)— — (28)
Ending balance$19 $19 $19 $6,074 $5,526 $5,495 $6,093 $5,545 $5,514 
Non-controlling interest—Redeemable Partnership Units held by Brookfield
 Non-controlling interest—Redeemable Partnership Units held by Brookfield
UNITS MILLIONS202120202019
Opening balance121.9 121.9 115.8 
Issued for cash7.1 — 6.1 
Ending balance129.0 121.9 121.9 
 Non-controlling interest—Redeemable Partnership Units held by Brookfield
US$ MILLIONS202120202019
Opening balance$2,328 $2,328 $2,078 
Unit issuance400 — 250 
Ending balance$2,728 $2,328 $2,328 
Non-controlling interest—BIPC exchangeable shares
 Non-controlling interest— BIPC exchangeable shares
UNITS MILLIONS202120202019
Opening balance44.9 — — 
Unit issuance2.1 — — 
Issued in conjunction with the acquisition of Inter Pipeline26.0 — — 
Non-cash issuance— 46.3 — 
Conversion to units(0.1)(1.4)— 
Conversion from BIPC Exchangeable LP Units0.4 — — 
Ending balance73.3 44.9 — 
 Non-controlling interest— BIPC exchangeable shares
US$ MILLIONS202120202019
Opening balance$(19)$— $— 
Unit issuance1,770 — — 
Conversion to units(1)(19)— 
Conversion from BIPC Exchangeable LP Units5 — — 
Ending balance$1,755 $(19)$— 
Non-controlling interest—Exchangeable Units
 Non-controlling interest—Exchangeable units
UNITS MILLIONS202120202019
Opening balance1.0 1.2 4.4 
Special distribution— 0.1 — 
Issuance of BIPC Exchangeable LP Units4.1 — — 
BIPC Exchangeable LP Units converted to BIPC exchangeable shares(0.4)— — 
Exchange LP Units converted to units(0.1)(0.3)(3.2)
Ending balance4.6 1.0 1.2 
 Non-controlling interest—Exchangeable units
US$ MILLIONS202120202019
Opening balance$156 $159 $212 
Issuance of BIPC Exchangeable LP Units259 — — 
BIPC Exchangeable LP Units converted to BIPC exchangeable shares(5)— — 
Exchange LP Units converted to units(2)(3)(53)
Ending balance$408 $156 $159 
Preferred Unitholders’ Capital
 Preferred Units
UNITS MILLIONS202120202019
Opening balance57.9 49.9 49.9 
Issued for cash8.0 8.0 — 
Repurchased and cancelled(10.0)— — 
Ending balance55.9 57.9 49.9 
 Preferred Units
US$ MILLIONS202120202019
Opening balance$1,130 $935 $936 
Unit issuance194 195 — 
Repurchased and cancelled(186)— (1)
Ending balance$1,138 $1,130 $935