December 31 | ||||||||
$ in millions | 2013 | 2012 | ||||||
Production costs of contracts in process | $ 1,342 | $ 1,593 | ||||||
General and administrative expenses | 259 | 262 | ||||||
1,601 | 1,855 | |||||||
Progress and performance-based payments received | (1,005 | ) | (1,167 | ) | ||||
596 | 688 | |||||||
Product inventory | 102 | 110 | ||||||
Total inventoried costs, net | $ 698 | $ 798 | ||||||