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v2.4.1.9

Debt (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 28, 2014 | Dec. 29, 2013
Short-term Debt [Line Items] |  |
Short-term borrowings | $ 91.9 us-gaap_ShortTermBorrowings | $ 28.3 us-gaap_ShortTermBorrowings
The Facility | Revolving Line of Credit |  |
Short-term Debt [Line Items] |  |
Maximum borrowing capacity | 200.0 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = kelya_TheFacilityMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_LineOfCreditMember |
Short-term borrowings | 0.4 us-gaap_ShortTermBorrowings / us-gaap_DebtInstrumentAxis = kelya_TheFacilityMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_LineOfCreditMember | 0 us-gaap_ShortTermBorrowings / us-gaap_DebtInstrumentAxis = kelya_TheFacilityMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_LineOfCreditMember
Remaining borrowing capacity | 199.6 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_DebtInstrumentAxis = kelya_TheFacilityMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_LineOfCreditMember | 200.0 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_DebtInstrumentAxis = kelya_TheFacilityMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_LineOfCreditMember
Commitment fee percentage (in basis points) | 0.25%us-gaap_LineOfCreditFacilityCommitmentFeePercentage / us-gaap_DebtInstrumentAxis = kelya_TheFacilityMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_LineOfCreditMember | 0.25%us-gaap_LineOfCreditFacilityCommitmentFeePercentage / us-gaap_DebtInstrumentAxis = kelya_TheFacilityMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_LineOfCreditMember
Interest rate | 3.75%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd / us-gaap_DebtInstrumentAxis = kelya_TheFacilityMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_LineOfCreditMember |
Securitization Facility |  |
Short-term Debt [Line Items] |  |
Maximum borrowing capacity | 150.0 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = kelya_SecuritizationFacilityMember |
Short-term borrowings | 88.0 us-gaap_ShortTermBorrowings / us-gaap_DebtInstrumentAxis = kelya_SecuritizationFacilityMember | 28.0 us-gaap_ShortTermBorrowings / us-gaap_DebtInstrumentAxis = kelya_SecuritizationFacilityMember
Remaining borrowing capacity | 7.5 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_DebtInstrumentAxis = kelya_SecuritizationFacilityMember | 67.0 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_DebtInstrumentAxis = kelya_SecuritizationFacilityMember
Interest rate | 0.57%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd / us-gaap_DebtInstrumentAxis = kelya_SecuritizationFacilityMember | 0.57%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd / us-gaap_DebtInstrumentAxis = kelya_SecuritizationFacilityMember
Securitization Facility | Standby Letter of Credit Related to Workers' Compensation |  |
Short-term Debt [Line Items] |  |
Interest rate | 0.40%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd / us-gaap_CreditFacilityAxis = kelya_StandbyLetterOfCreditRelatedToWorkersCompensationMember / us-gaap_DebtInstrumentAxis = kelya_SecuritizationFacilityMember | 0.40%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd / us-gaap_CreditFacilityAxis = kelya_StandbyLetterOfCreditRelatedToWorkersCompensationMember / us-gaap_DebtInstrumentAxis = kelya_SecuritizationFacilityMember
Letters of credit outstanding | 54.5 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_CreditFacilityAxis = kelya_StandbyLetterOfCreditRelatedToWorkersCompensationMember / us-gaap_DebtInstrumentAxis = kelya_SecuritizationFacilityMember | 55.0 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_CreditFacilityAxis = kelya_StandbyLetterOfCreditRelatedToWorkersCompensationMember / us-gaap_DebtInstrumentAxis = kelya_SecuritizationFacilityMember
Unsecured Uncommitted Short-term Local Credit Facilities |  |
Short-term Debt [Line Items] |  |
Maximum borrowing capacity | 15.5 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = kelya_UnsecureduncommittedshorttermlocalcreditfacilitiesMember |
Short-term borrowings | $ 3.5 us-gaap_ShortTermBorrowings / us-gaap_DebtInstrumentAxis = kelya_UnsecureduncommittedshorttermlocalcreditfacilitiesMember | $ 0.3 us-gaap_ShortTermBorrowings / us-gaap_DebtInstrumentAxis = kelya_UnsecureduncommittedshorttermlocalcreditfacilitiesMember
Interest rate | 2.50%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd / us-gaap_DebtInstrumentAxis = kelya_UnsecureduncommittedshorttermlocalcreditfacilitiesMember | 10.75%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd / us-gaap_DebtInstrumentAxis = kelya_UnsecureduncommittedshorttermlocalcreditfacilitiesMember
Facility Fee | Securitization Facility |  |
Short-term Debt [Line Items] |  |
Commitment fee percentage (in basis points) | 0.40%us-gaap_LineOfCreditFacilityCommitmentFeePercentage / us-gaap_DebtInstrumentAxis = kelya_SecuritizationFacilityMember / us-gaap_NatureOfExpenseAxis = kelya_FacilityFeeMember |

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