Fair Value Measurements and Other-Than-Temporary Impairments - Investments at Fair Value (Parenthetical) (Details) (ARS [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2012
ARS [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
OTTI credit related to prior period	$ 0.4