Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Summary of Significant Accounting Policies AOCI Reclassified (Details) (Accumulated Other Comprehensive Income (Loss) [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 30, 2013
AOCI Reclassification into Statement of Operations [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ 18
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
AOCI Reclassification into Statement of Operations [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	12
Accumulated Net Unrealized Investment Gain (Loss) [Member]
AOCI Reclassification into Statement of Operations [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ 6