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Other Deferred Credits (Notes)
 12 Months Ended
Dec. 31, 2018
Other Deferred Credit [Abstract]  
Other Deferred Credits Other Deferred Credits
 
December 31,20182017
(In millions of Canadian dollars)
Trust liability(Note 7)6.1 
Postretirement benefit liability1.8 — 
Environmental liabilities0.1 — 
Other0.9 0.8 
8.9 0.8