Segment Data (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Segment Reporting Information [Line Items]
Revenues from services	$ 5,416.0	[1]	$ 5,188.8	[1]	$ 15,641.7	[1]	$ 14,998.4	[1]
Operating profit	212.3		162.4		526.6		344.9
Interest and other expenses	(9.9)		(5.4)		(27.0)		(27.2)
Earnings before income taxes	202.4		157.0		499.6		317.7
Franchise fees	6.9		6.6		18.8		18.0
Franchise revenue	302.0		285.4		845.2		792.4
Americas [Member] | United States [Member] | Reportable Subsegments [Member]
Segment Reporting Information [Line Items]
Revenues from services	800.5	[2]	761.8	[2]	2,296.9	[2]	2,216.4	[2]
Operating Unit Profit (Loss)	41.9	[3]	34.3	[3]	85.0	[3]	72.3	[3]
Americas [Member] | Other Americas [Member] | Reportable Subsegments [Member]
Segment Reporting Information [Line Items]
Revenues from services	388.5		382.0		1,114.3		1,156.1
Operating Unit Profit (Loss)	14.6	[3]	11.4	[3]	41.2	[3]	32.0	[3]
Southern Europe [Member] | France [Member] | Reportable Subsegments [Member]
Segment Reporting Information [Line Items]
Revenues from services	1,454.3		1,420.7		4,083.7		3,886.5
Operating Unit Profit (Loss)	84.2	[3]	58.4	[3]	207.3	[3]	129.0	[3]
Southern Europe [Member] | Italy [Member] | Reportable Subsegments [Member]
Segment Reporting Information [Line Items]
Revenues from services	294.1		269.7		882.7		806.0
Operating Unit Profit (Loss)	14.7	[3]	10.7	[3]	45.6	[3]	37.1	[3]
Southern Europe [Member] | Other Southern Europe [Member] | Reportable Subsegments [Member]
Segment Reporting Information [Line Items]
Revenues from services	259.9		227.9		732.9		624.3
Operating Unit Profit (Loss)	6.1	[3]	4.0	[3]	16.4	[3]	7.5	[3]
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Unit Profit (Loss)	249.0	[3]	192.8	[3]	629.8		440.1
Operating Segments [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Revenues from services	1,189.0		1,143.8		3,411.2		3,372.5
Operating Unit Profit (Loss)	56.5	[3]	45.7	[3]	126.2	[3]	104.3	[3]
Operating Segments [Member] | Americas [Member] | United States [Member]
Segment Reporting Information [Line Items]
Franchise fees	4.4		4.2		11.7		11.2
Franchise revenue	196.3		181.6		555.7		512.0
Operating Segments [Member] | Southern Europe [Member]
Segment Reporting Information [Line Items]
Revenues from services	2,008.3		1,918.3		5,699.3		5,316.8
Operating Unit Profit (Loss)	105.0	[3]	73.1	[3]	269.3	[3]	173.6	[3]
Operating Segments [Member] | Northern Europe [Member]
Segment Reporting Information [Line Items]
Revenues from services	1,554.6		1,448.1		4,546.3		4,217.2
Operating Unit Profit (Loss)	59.6	[3]	50.3	[3]	144.2	[3]	94.1	[3]
Operating Segments [Member] | APME [Member]
Segment Reporting Information [Line Items]
Revenues from services	592.5		601.4		1,760.2		1,857.2
Operating Unit Profit (Loss)	21.6	[3]	19.2	[3]	62.8	[3]	54.2	[3]
Operating Segments [Member] | Right Management [Member]
Segment Reporting Information [Line Items]
Revenues from services	71.6		77.2		224.7		234.7
Operating Unit Profit (Loss)	6.3	[3]	4.5	[3]	27.3	[3]	13.9	[3]
Corporate [Member]
Segment Reporting Information [Line Items]
Corporate expenses	(28.3)		(21.9)		(78.2)		(69.9)
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Intangible asset amortization expense	$ (8.4)	[3]	$ (8.5)	[3]	$ (25.0)	[3]	$ (25.3)	[3]

[1] Our consolidated revenues from services include fees received from our franchise offices of $6.9 and $6.6 for the three months ended September 30, 2014 and 2013, respectively, and $18.8 and $18.0 for the nine months ended September 30, 2014 and 2013, respectively. These fees are primarily based on revenues generated by the franchise offices, which were $302.0 and $285.4 for the three months ended September 30, 2014 and 2013, respectively, and $845.2 and $792.4 for the nine months ended September 30, 2014 and 2013, respectively.

[2] In the United States, where a majority of our franchises operate, revenues from services include fees received from the related franchise offices of $4.4 and $4.2 for the three months ended September 30, 2014 and 2013, respectively, and $11.7 and $11.2 for the nine months ended September 30, 2014 and 2013, respectively. These fees are primarily based on revenues generated by the franchise offices, which were $196.3 and $181.6 for the three months ended September 30, 2014 and 2013, respectively, and $555.7 and $512.0 for the nine months ended September 30, 2014 and 2013, respectively.

[3] We evaluate segment performance based on operating unit profit OUP which is equal to segment revenues less cost of services and branch and national headquarters operating costs. This profit measure does not include goodwill and intangible asset impairment charges or amortization of intangibles related to acquisitions, interest and other income and expense amounts or income taxes.