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Segment Disclosures - Segment Revenue Per Service (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Revenue from Services
Segment Revenue from Services	$ 1,351.0	$ 1,396.4	$ 4,056.6	$ 4,137.7
Less: Intersegment revenue
Revenue from Services
Segment Revenue from Services	(14.8)	(17.7)	(49.3)	(48.0)
Total Americas Commercial and PT | Reporting Segments
Revenue from Services
Segment Revenue from Services	858.3	883.3	2,630.0	2,638.2
Total EMEA Commercial and PT | Reporting Segments
Revenue from Services
Segment Revenue from Services	242.6	279.4	699.8	835.7
Total APAC Commercial and PT | Reporting Segments
Revenue from Services
Segment Revenue from Services	93.1	101.6	289.8	289.7
Americas Commercial | Reporting Segments
Revenue from Services
Segment Revenue from Services	615.5	640.8	1,908.2	1,915.1
Americas PT | Reporting Segments
Revenue from Services
Segment Revenue from Services	242.8	242.5	721.8	723.1
EMEA Commercial | Reporting Segments
Revenue from Services
Segment Revenue from Services	199.0	231.3	573.0	690.2
EMEA PT | Reporting Segments
Revenue from Services
Segment Revenue from Services	43.6	48.1	126.8	145.5
APAC Commercial | Reporting Segments
Revenue from Services
Segment Revenue from Services	83.2	91.0	259.1	260.5
APAC PT | Reporting Segments
Revenue from Services
Segment Revenue from Services	9.9	10.6	30.7	29.2
OCG | Reporting Segments
Revenue from Services
Segment Revenue from Services	$ 171.8	$ 149.8	$ 486.3	$ 422.1

X

- Definition

Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 225



-SubTopic 10



-Section S99



-Paragraph 2



-Subparagraph (SX 210.5-03.1(d))



-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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