Quarterly Financial Data (unaudited) (Net sales and gross profit) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Jan. 01, 2011	Oct. 02, 2010	Jul. 03, 2010	Apr. 03, 2010	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Quarterly Financial Data [Abstract]
Net sales	$ 3,015	$ 3,312	$ 3,386	$ 3,485	$ 2,860	$ 3,157	$ 3,062	$ 3,318	$ 13,198	$ 12,397	$ 12,575
Gross profit	$ 1,234	$ 1,350	$ 1,443	$ 1,421	$ 1,190	$ 1,369	$ 1,305	$ 1,425	$ 5,448	$ 5,289

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 1

Reference 2: 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(a))

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration