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## 21. Leases 

The Company’s leases have remaining terms of less than one year to 15 years, some include options to extend up to an additional 10 years, and some include options to terminate within one year. 

Residual value guarantees are provided on certain rolling stock and vehicle operating leases. Cumulatively, these guarantees are limited to $2 million and are not included in lease liabilities as it is not currently probable that any amounts will be owed under these residual value guarantees. 

The components of lease expense for the year ended December 31 are as follows: 

<img src='content_image/1058496.jpg'>

Supplemental balance sheet information related to leases is as follows: 

<img src='content_image/1058498.jpg'>

The following table provides the Company's weighted-average remaining lease terms and discount rates: 

<img src='content_image/1058500.jpg'>

