XML 53 R42.htm IDEA: XBRL DOCUMENT v3.21.2

Revenue - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2021	Jun. 28, 2020	Jul. 04, 2021	Jun. 28, 2020	Jan. 03, 2021
Deferred Sales Commissions
Revenue from Contract with Customer [Line Items]
Capitalized Contract Cost, Net	$ 0.9		$ 0.9		$ 1.0
Capitalized contract cost, amortization	0.2	$ 0.3	0.4	$ 0.6
Deferred Fulfillment Costs
Revenue from Contract with Customer [Line Items]
Capitalized Contract Cost, Net	2.0		2.0		$ 4.1
Capitalized contract cost, amortization	$ 5.2	$ 4.8	$ 12.1	$ 9.6

X

- Definition

[Line Items] for Revenue from Contract with Customer [Table]

+ References

No definition available.

+ Details

Name:	kelya_RevenuefromContractwithCustomerLineItems
Namespace Prefix:	kelya_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123353750&loc=SL49131252-203054

+ Details

Name:	us-gaap_CapitalizedContractCostAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123353750&loc=SL49131252-203054

+ Details

Name:	us-gaap_CapitalizedContractCostNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_CapitalizedContractCostAxis=kelya_DeferredSalesCommissionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CapitalizedContractCostAxis=kelya_DeferredFulfillmentCostsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: