XML 134 R31.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2019
Accounting Policies [Abstract]  
Schedule of Property Plant and Equipment, Useful Lives
Depreciation and amortization are computed using the straight-line method over the lesser of the remaining lease term or the following estimated useful lives:

Buildings and improvements
5-30 years
Transportation fleet equipment
3-8 years
Software
3 years
Furniture, fixtures and equipment
3-5 years