Boeing boosted its cash and investments balance to $11.3 billion at 31 December from $9.2 billion at the beginning of the fourth quarter.
Debt was unchanged in the three months to 31 December, Boeing said in an earnings release today.
Boeing's total company backlog at 31 December was $356 billion, up from $332 billion at the beginning of the quarter. Net orders for the quarter were $42 billion.
Backlog is up $34.6 billion from 2010, reflecting $103 billion of net orders in 2011.
Quarterly operating cash flow was $2.9 billion, with operating performance "more than offsetting" continued investment in the 787 and 747-8 programmes, said Boeing.
For the full year, operating cash flow was $4 billion.