Nature of Operations and Significant Accounting Policies (Other Items - Share Repurchases) (Details) (USD $) Share data in Millions, unless otherwise specified	12 Months Ended	1 Months Ended	7 Months Ended	1 Months Ended
Dec. 30, 2011 Previous Repurchase Program [Member]	May 31, 2011 New Repurchase Program [Member]	Dec. 30, 2011 New Repurchase Program [Member]	Feb. 13, 2012 New Repurchase Program [Member] Repurchase of Equity [Member]
Equity, Class of Treasury Stock [Line Items]
Shares acquired, repurchase amount	1,600		1,300	178
Share repurchase program		$ 2,000,000,000
Remaining authority			$ 734,000,000

Number of shares that have been repurchased during the period and are being held in treasury.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

Name:	us-gaap_TreasuryStockSharesAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration