Stock Transactions And Stock-Based Compensation (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 28, 2014	Mar. 29, 2013	Jul. 16, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized shares to be repurchased			20,000,000
Stock repurchase program, remaining number of shares authorized to be repurchased	20,000,000
Common shares reserved for issuance under the 2007 Stock Incentive Plan (shares)	28,000,000
Aggregate intrinsic value of options exercised	$ 33	$ 47
Cash receipts due to exercise of options	26	49
Total number of shares withheld sufficient to fund minimum tax withholding requirements related to the vesting of restricted stock units (shares)	301,000
Total value of shares withheld sufficient to fund minimum tax withholding requirements related to the vesting of restricted stock units	23
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost	161
Weighted average period for cost to be recognized (in years)	3 years
Tax benefit realized related to exercise of stock options	20
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost	143
Weighted average period for cost to be recognized (in years)	3 years
Tax benefit realized related to exercise of stock options	$ 10