Acquisitions	12 Months Ended
Dec. 31, 2017
Business Combinations [Abstract]
Acquisitions	Acquisitions From time to time, we acquire and invest in companies throughout the world, including franchises. The total cash consideration paid for acquisitions, net of cash acquired, for the years ended December 31, 2017, 2016 and 2015 was $32.7, $57.6 and $260.5, respectively. As of December 31, 2017, goodwill and intangible assets resulting from the 2017 acquisitions were $35.0 and $13.3, respectively, the majority of which took place in India and Hong Kong. In addition, during the year ended December 31, 2017, we made payments of $13.0 for contingent consideration related to previous acquisitions, including our 2015 acquisition of 7S Group GmbH (“7S”) in Germany. As of December 31, 2016, goodwill and intangible assets resulting from the 2016 acquisitions were $24.4 and $6.6, respectively, the majority of which took place in the Netherlands and Norway. During the year ended December 31, 2016, we made payments of $2.9 for contingent consideration related to previous acquisitions. In September 2015, we acquired 7S for total consideration, net of cash acquired, of $140.4 (€125.3) plus contingent consideration of $10.3 (€9.6) paid in the first quarter of 2017 based on the financial results of the company and other factors. In addition, we incurred approximately $3.4 of transaction costs associated with the acquisition during the year ended December 31, 2015, which have been recorded in selling and administrative expenses. Based primarily in Germany, 7S is a highly specialized provider of human resource services focusing on a number of core sectors including skilled trades, engineering and IT. Of the $153.0 (€136.5) of net acquired assets from the 7S acquisition, $48.8 (€43.5) was recorded as finite-lived intangible assets, of which $44.2 (€39.4) was assigned to customer relationships and will be amortized over 10 years using the straight line method. The customer relationships were $36.0 (€34.2) and $36.3 (€30.2) as of December 31, 2016 and 2017, respectively. Total amortization expense related to this intangible asset in each of the next five years is $4.8. The fair value of $119.1 (€106.2), which was not directly attributable to any specific assets or liabilities, was assigned to goodwill as part of the Germany reporting unit.

Acquisitions

12 Months Ended

Dec. 31, 2017

From time to time, we acquire and invest in companies throughout the world, including franchises. The total cash consideration paid for acquisitions, net of cash acquired, for the years ended December 31, 2017, 2016 and 2015 was $32.7, $57.6 and $260.5, respectively. As of December 31, 2017, goodwill and intangible assets resulting from the 2017 acquisitions were $35.0 and $13.3, respectively, the majority of which took place in India and Hong Kong. In addition, during the year ended December 31, 2017, we made payments of $13.0 for contingent consideration related to previous acquisitions, including our 2015 acquisition of 7S Group GmbH (“7S”) in Germany. As of December 31, 2016, goodwill and intangible assets resulting from the 2016 acquisitions were $24.4 and $6.6, respectively, the majority of which took place in the Netherlands and Norway. During the year ended December 31, 2016, we made payments of $2.9 for contingent consideration related to previous acquisitions.

In September 2015, we acquired 7S for total consideration, net of cash acquired, of $140.4 (€125.3) plus contingent consideration of $10.3 (€9.6) paid in the first quarter of 2017 based on the financial results of the company and other factors. In addition, we incurred approximately $3.4 of transaction costs associated with the acquisition during the year ended December 31, 2015, which have been recorded in selling and administrative expenses. Based primarily in Germany, 7S is a highly specialized provider of human resource services focusing on a number of core sectors including skilled trades, engineering and IT. Of the $153.0 (€136.5) of net acquired assets from the 7S acquisition, $48.8 (€43.5) was recorded as finite-lived intangible assets, of which $44.2 (€39.4) was assigned to customer relationships and will be amortized over 10 years using the straight line method. The customer relationships were $36.0 (€34.2) and $36.3 (€30.2) as of December 31, 2016 and 2017, respectively. Total amortization expense related to this intangible asset in each of the next five years is $4.8. The fair value of

$119.1 (€106.2), which was not directly attributable to any specific assets or liabilities, was assigned to goodwill as part of the Germany reporting unit.