Stock Transactions And Stock-Based Compensation (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended		3 Months Ended
	Mar. 29, 2013	May 12, 2010	Mar. 29, 2013	Mar. 30, 2012	Dec. 31, 2012	May 31, 2012	May 09, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (shares)						2,000,000,000	1,000,000,000
Common stock, par value (dollars per share)	$ 0.01		$ 0.01		$ 0.01	$ 0.01
Stock repurchase program, authorized amount		$ 20
Stock repurchase program, remaining authorized repurchase amount	7.5
Common shares reserved for issuance under the 2007 Stock Incentive Plan (shares)	14,000,000		14,000,000
Aggregate intrinsic value of options exercised			47	98
Cash receipts due to exercise of options			49	83
Tax benefit realized related to exercise of stock options			15
Tax benefit related to the vesting of restricted stock units			14
Total number of shares withheld sufficient to fund minimum tax withholding requirements related to the vesting of restricted stock units (shares)			270,000
Total value of shares withheld sufficient to fund minimum tax withholding requirements related to the vesting of restricted stock units			17
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost	146		146
Weighted average period for cost to be recognized (in years)			2 years
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost	$ 139		$ 139
Weighted average period for cost to be recognized (in years)			2 years