XML 11 R41.htm IDEA: XBRL DOCUMENT
v3.20.1

Commitments and Contingencies (Details) | Mar. 31, 2020
--- | ---
Environmental Contingencies |
Ownership interest in domestic subsidiaries (as a percent) | 100.00%

X
- References No definition available. + Details
Name: | rs_EnvironmentalContingenciesAbstract
Namespace Prefix: | rs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | rs_MajorityInterestOwnershipPercentageByParent
Namespace Prefix: | rs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant