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LEASES (Tables)
 12 Months Ended
Dec. 31, 2019
Disclosure of leases [Abstract]  
Summary of activity related to lease liabilities
Below is a summary of the activity related to our lease liabilities for the twelve months ended December 31, 2019. Certain of our lease liabilities are secured by the underlying right-of-use assets; the underlying right-of-use assets have a net carrying amount of $114 million.
(In millions of dollars)
 
December 31, 2019

 
 
 
Lease liabilities, beginning of year
 
1,545

Net additions
 
335

Interest expense on lease liabilities
 
61

Interest payments on lease liabilities
 
(49
)
Principal payments of lease liabilities
 
(167
)
 
 
 
Lease liabilities, end of year
 
1,725

 
 
 
Current liability
 
230

Long-term liability
 
1,495

 
 
 
Lease liabilities
 
1,725