Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014
Information about Litigation Matters
Number of vendors company purchased engines	1
Letters of Credit
Letters of credit outstanding, amount	$ 50.5	$ 42.6
DC Construction Project [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase Obligation, Due in Next Twelve Months	26.7
DC Mixing Center Project [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase Obligation, Due in Next Twelve Months	$ 9.7