Balance Beginning of Period | Additions Charged (Reductions Credited) To Operations | Deductions(1) | Balance End of Period | |||||||||||||
Allowance for doubtful accounts: | ||||||||||||||||
Years ended: | ||||||||||||||||
December 31, 2011 | $ | 4 | $ | (1 | ) | $ | (1 | ) | $ | 2 | ||||||
December 29, 2012 | $ | 2 | $ | — | $ | — | $ | 2 | ||||||||
December 28, 2013 | $ | 2 | $ | (2 | ) | $ | — | $ | — | |||||||