Three Years Ended December 28, 2013 (In Millions) | Balance at Beginning of Year | Additions Charged to Expenses/ Other Accounts | Net (Deductions) Recoveries | Balance at End of Year | ||||||||||||
Allowance for doubtful receivables | ||||||||||||||||
2013 | $ | 38 | $ | 5 | $ | (5 | ) | $ | 38 | |||||||
2012 | $ | 36 | $ | 3 | $ | (1 | ) | $ | 38 | |||||||
2011 | $ | 28 | $ | 8 | $ | — | $ | 36 | ||||||||
Valuation allowance for deferred tax assets | ||||||||||||||||
2013 | $ | 389 | $ | 88 | $ | (21 | ) | $ | 456 | |||||||
2012 | $ | 373 | $ | 77 | $ | (61 | ) | $ | 389 | |||||||
2011 | $ | 252 | $ | 121 | $ | — | $ | 373 |