Income Taxes Income Taxes (Details) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended		0 Months Ended	57 Months Ended	0 Months Ended
	Sep. 26, 2014 USD ($)	Sep. 27, 2013	Sep. 26, 2014	Sep. 27, 2013	Dec. 10, 2013 Foreign Tax Authority Denmark, Kroner DKK	Sep. 26, 2014 Foreign Tax Authority Denmark, Kroner DKK	Sep. 26, 2014 Foreign Tax Authority United States of America, Dollars USD ($)
Effective income tax rate reconciliation, percent	22.40%	23.30%	23.10%	24.00%
Effective income tax rate reconciliation, at Federal statutory income tax rate, percent			35.00%	35.00%
Discrete tax benefits, amount	$ (8)
Discrete tax benefits, diluted (dollars per share)	$ 0.01
Income tax examination, amount of tax assessments					1,100		195
Income tax examination, amount of potential additional tax assessments						840	$ 145