Debt Narrative (Details) (USD $) In Millions, unless otherwise specified	Sep. 24, 2011	Dec. 25, 2010	Sep. 24, 2011 Line of Credit [Member] Revolving Multicurrency Bank Credit Facility [Member]	Jun. 25, 2011 Line of Credit [Member] Revolving Multicurrency Bank Credit Facility [Member] years
Debt Instrument [Line Items]
Short-term borrowings	$ 1.6	$ 1.1
Amount of revolving multicurrency bank credit facility that was terminated				750
Term of credit facility (in years)				4
Revolving credit facility, maximum borrowing capacity				400
Additional capacity for letters of credit				100
Debt issuance costs capitalized				2.2
Line of Credit Facility, Current Borrowing Capacity			$ 0