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v2.4.1.9

Condensed Consolidating Financial Statements (Details 3) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Condensed Consolidating Cash Flow Statement |  |  |
Cash provided by operating activities | $ 356.0 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | $ 633.3 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | $ 601.9 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Investing activities: |  |  |
Purchases of property, plant and equipment | (190.4)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (168.0)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (214.0)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Acquisitions, net of cash acquired | (208.2)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired | (821.1)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired | (166.9)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Other investing activities, net | 33.6 rs_OtherInvestingActivities | 10.1 rs_OtherInvestingActivities | (0.8)rs_OtherInvestingActivities
Net cash used in investing activities | (365.0)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (979.0)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (381.7)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Financing activities: |  |  |
Net short-term debt (repayments) borrowings | 1.7 us-gaap_ProceedsFromRepaymentsOfShortTermDebt | (473.0)us-gaap_ProceedsFromRepaymentsOfShortTermDebt | (63.2)us-gaap_ProceedsFromRepaymentsOfShortTermDebt
Proceeds from long-term debt borrowings | 719.0 us-gaap_ProceedsFromIssuanceOfLongTermDebt | 2,297.9 us-gaap_ProceedsFromIssuanceOfLongTermDebt | 641.0 us-gaap_ProceedsFromIssuanceOfLongTermDebt
Principal payments on long-term debt | (552.2)us-gaap_RepaymentsOfLongTermDebt | (1,454.5)us-gaap_RepaymentsOfLongTermDebt | (763.0)us-gaap_RepaymentsOfLongTermDebt
Dividends paid | (108.7)us-gaap_PaymentsOfDividendsCommonStock | (96.9)us-gaap_PaymentsOfDividendsCommonStock | (60.2)us-gaap_PaymentsOfDividendsCommonStock
Other financing activities, net | (26.8)rs_OtherFinancingActivities | 58.6 rs_OtherFinancingActivities | 37.8 rs_OtherFinancingActivities
Net cash provided by (used in) financing activities | 33.0 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | 332.1 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | (207.6)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Effect of exchange rate changes on cash and cash equivalents | (1.4)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations | (0.4)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations | 0.4 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations
Increase (decrease) in cash and cash equivalents | 22.6 us-gaap_NetCashProvidedByUsedInContinuingOperations | (14.0)us-gaap_NetCashProvidedByUsedInContinuingOperations | 13.0 us-gaap_NetCashProvidedByUsedInContinuingOperations
Cash and cash equivalents at beginning of year | 83.6 us-gaap_CashAndCashEquivalentsAtCarryingValue | 97.6 us-gaap_CashAndCashEquivalentsAtCarryingValue | 84.6 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of year | 106.2 us-gaap_CashAndCashEquivalentsAtCarryingValue | 83.6 us-gaap_CashAndCashEquivalentsAtCarryingValue | 97.6 us-gaap_CashAndCashEquivalentsAtCarryingValue
Reportable legal entities | Parent |  |  |
Condensed Consolidating Cash Flow Statement |  |  |
Cash provided by operating activities | 118.4 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 102.8 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 23.3 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Investing activities: |  |  |
Purchases of property, plant and equipment | (18.2)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (14.0)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (16.0)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Acquisitions, net of cash acquired |  | (821.1)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (117.5)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net advances to subsidiaries | (119.7)rs_PaymentsForProceedsFromSubsidiaryAdvances / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (85.3)rs_PaymentsForProceedsFromSubsidiaryAdvances / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 260.2 rs_PaymentsForProceedsFromSubsidiaryAdvances / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Other investing activities, net | (0.8)rs_OtherInvestingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0.1 rs_OtherInvestingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1.8 rs_OtherInvestingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net cash used in investing activities | (138.7)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (920.3)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 128.5 us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Financing activities: |  |  |
Proceeds from long-term debt borrowings | 719.0 us-gaap_ProceedsFromIssuanceOfLongTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 2,297.9 us-gaap_ProceedsFromIssuanceOfLongTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 641.0 us-gaap_ProceedsFromIssuanceOfLongTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Principal payments on long-term debt | (549.3)us-gaap_RepaymentsOfLongTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (1,452.8)us-gaap_RepaymentsOfLongTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (761.3)us-gaap_RepaymentsOfLongTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Dividends paid | (108.7)us-gaap_PaymentsOfDividendsCommonStock / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (96.9)us-gaap_PaymentsOfDividendsCommonStock / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (60.2)us-gaap_PaymentsOfDividendsCommonStock / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Other financing activities, net | (18.5)rs_OtherFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 60.9 rs_OtherFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 41.7 rs_OtherFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net cash provided by (used in) financing activities | 42.5 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 809.1 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (138.8)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Increase (decrease) in cash and cash equivalents | 22.2 us-gaap_NetCashProvidedByUsedInContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (8.4)us-gaap_NetCashProvidedByUsedInContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 13.0 us-gaap_NetCashProvidedByUsedInContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash and cash equivalents at beginning of year | 19.7 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 28.1 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 15.1 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash and cash equivalents at end of year | 41.9 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 19.7 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 28.1 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Reportable legal entities | Guarantor Subsidiaries |  |  |
Condensed Consolidating Cash Flow Statement |  |  |
Cash provided by operating activities | 193.2 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 458.5 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 512.9 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Investing activities: |  |  |
Purchases of property, plant and equipment | (159.2)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (139.9)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (171.1)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Acquisitions, net of cash acquired | (92.0)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  | (49.4)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Other investing activities, net | (3.6)rs_OtherInvestingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 2.8 rs_OtherInvestingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (2.7)rs_OtherInvestingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Net cash used in investing activities | (254.8)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (137.1)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (223.2)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Financing activities: |  |  |
Net short-term debt (repayments) borrowings |  | (473.8)us-gaap_ProceedsFromRepaymentsOfShortTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (59.4)us-gaap_ProceedsFromRepaymentsOfShortTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Principal payments on long-term debt | (2.0)us-gaap_RepaymentsOfLongTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (0.6)us-gaap_RepaymentsOfLongTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (1.7)us-gaap_RepaymentsOfLongTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Net intercompany borrowings | 64.4 rs_ProceedsFromRepaymentsOfIntercompanyBorrowings / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 141.4 rs_ProceedsFromRepaymentsOfIntercompanyBorrowings / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (223.2)rs_ProceedsFromRepaymentsOfIntercompanyBorrowings / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Other financing activities, net | (8.3)rs_OtherFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (2.3)rs_OtherFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (3.1)rs_OtherFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Net cash provided by (used in) financing activities | 54.1 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (335.3)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (287.4)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Increase (decrease) in cash and cash equivalents | (7.5)us-gaap_NetCashProvidedByUsedInContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (13.9)us-gaap_NetCashProvidedByUsedInContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 2.3 us-gaap_NetCashProvidedByUsedInContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Cash and cash equivalents at beginning of year | (0.8)us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 13.1 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 10.8 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Cash and cash equivalents at end of year | (8.3)us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (0.8)us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 13.1 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Reportable legal entities | Non-Guarantor Subsidiaries |  |  |
Condensed Consolidating Cash Flow Statement |  |  |
Cash provided by operating activities | 44.4 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 72.0 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 65.7 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Investing activities: |  |  |
Purchases of property, plant and equipment | (13.0)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (14.1)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (26.9)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Acquisitions, net of cash acquired | (116.2)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Other investing activities, net | 38.0 rs_OtherInvestingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 7.2 rs_OtherInvestingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0.1 rs_OtherInvestingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Net cash used in investing activities | (91.2)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (6.9)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (26.8)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Financing activities: |  |  |
Net short-term debt (repayments) borrowings | 1.7 us-gaap_ProceedsFromRepaymentsOfShortTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0.8 us-gaap_ProceedsFromRepaymentsOfShortTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (3.8)us-gaap_ProceedsFromRepaymentsOfShortTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Principal payments on long-term debt | (0.9)us-gaap_RepaymentsOfLongTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (1.1)us-gaap_RepaymentsOfLongTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |
Net intercompany borrowings | 55.3 rs_ProceedsFromRepaymentsOfIntercompanyBorrowings / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (56.1)rs_ProceedsFromRepaymentsOfIntercompanyBorrowings / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (37.0)rs_ProceedsFromRepaymentsOfIntercompanyBorrowings / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Other financing activities, net |  |  | (0.8)rs_OtherFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Net cash provided by (used in) financing activities | 56.1 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (56.4)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (41.6)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Effect of exchange rate changes on cash and cash equivalents | (1.4)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (0.4)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0.4 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Increase (decrease) in cash and cash equivalents | 7.9 us-gaap_NetCashProvidedByUsedInContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 8.3 us-gaap_NetCashProvidedByUsedInContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (2.3)us-gaap_NetCashProvidedByUsedInContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Cash and cash equivalents at beginning of year | 64.7 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 56.4 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 58.7 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Cash and cash equivalents at end of year | 72.6 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 64.7 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 56.4 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableLegalEntitiesMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Consolidating Adjustments |  |  |
Investing activities: |  |  |
Net advances to subsidiaries | 119.7 rs_PaymentsForProceedsFromSubsidiaryAdvances / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 85.3 rs_PaymentsForProceedsFromSubsidiaryAdvances / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | (260.2)rs_PaymentsForProceedsFromSubsidiaryAdvances / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Net cash used in investing activities | 119.7 us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 85.3 us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | (260.2)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Financing activities: |  |  |
Net intercompany borrowings | (119.7)rs_ProceedsFromRepaymentsOfIntercompanyBorrowings / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | (85.3)rs_ProceedsFromRepaymentsOfIntercompanyBorrowings / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 260.2 rs_ProceedsFromRepaymentsOfIntercompanyBorrowings / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Net cash provided by (used in) financing activities | $ (119.7)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | $ (85.3)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | $ 260.2 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3044-108585 + Details
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- Definition The effect of exchange rate changes on cash balances in continuing operations held in foreign currencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450594&loc=d3e33268-110906 + Details
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- Definition Amount of cash inflow (outflow) of investing activities, excluding discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3574-108585 + Details
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- Definition Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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