Pension And Other Postretirement Benefits (Narrative) (Details) (USD $) In Millions	0 Months Ended	6 Months Ended
Jul. 15, 2011	Jun. 30, 2011
Pension And Other Postretirement Benefits
Estimated minimum required contribution for defined benefit plans		$ 520
Minimum required contribution to defined benefit plan before reduction	$ 99	$ 188

The amount of the benefits expected to be paid in Year 1.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph f

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearOne
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant