Property, Plant and Equipment - Summary of Property, Plant and Equipment (Footnote) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Internal-use software development cost	$ 86.2	$ 73.0
Internal-use software development cost, accumulated amortization	$ 42.6	$ 31.1

The carrying amount of capitalized internal-use computer software costs net of accumulated amortization as of the balance sheet date.

No definition available.

Name:	aan_CapitalizedInternalUseComputerSoftwareNet
Namespace Prefix:	aan_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant