Long-term Customer Financing and Sales Of Receivables (Narrative) (Details) (USD $)	3 Months Ended
	Apr. 04, 2015 Contract loan	Mar. 29, 2014	Dec. 31, 2014
Receivables [Abstract]
Commitments to provide long-term financing	$ 65,000,000		$ 293,000,000
Number of large customers contracts	2
Servicing obligations for long-term receivables	596,000,000		496,000,000
Financing receivables past due over 90 days	11,000,000		12,000,000
Number of loans, past due over 90 days	2
Interest accrued on loans	$ 0	$ 0