Receivables (Narrative) (Details) - USD ($) $ in Billions	6 Months Ended
Jul. 04, 2015	Jun. 28, 2014
Receivables [Abstract]
Client cash collections	$ 2.1	$ 1.7

Cash receipts from customers during the current period which are usually for sales of goods and services.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3536-108585

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