Stock-Based Compensation (Details 8) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended						3 Months Ended
	Dec. 28, 2012	Dec. 02, 2011	Dec. 28, 2012 Class A common stock	Dec. 02, 2011 Class A common stock	Dec. 28, 2012 Class B common stock	Dec. 02, 2011 Class B common stock	Mar. 31, 2013 Stock options	Mar. 31, 2012 Stock options	Mar. 31, 2012 Stock options Maximum	Mar. 31, 2012 Stock options Minimum	Mar. 31, 2013 Stock option adjustment 2012
Black-Scholes option valuation model, assumptions
Risk free interest rate, low end of range (as a percent)								0.51%
Risk free interest rate, high end of range (as a percent)								1.29%
Risk free interest rate (as a percent)							1.93%
Volatility factor, low end of range (as a percent)								38.80%
Volatility factor, high end of range (as a percent)								39.34%
Volatility factor (as a percent)							32.37%
Expected term of options							10 years		5 years 10 months 24 days	3 years 4 months 24 days
Weighted-average fair value of options granted (in dollars per share)							$ 16.37		$ 12.69	$ 9.49
Dividend in cash per share			$ 1.00	$ 2.00	$ 1.00	$ 2.00
Adjustment to recognized non-cash, stock-based compensation expense to be expensed over the remaining vesting period											$ 5
Dividend yield (as a percent)	0.00%	0.00%