. contributions and expected benefit payments the funding of our qualified defined benefit pension plans is determined in accordance with erisa , as amended by the ppa , and in a manner consistent with cas and internal revenue code rules . in 2014 , we made contributions of $ 2.0 billion related to our qualified defined benefit pension plans . we do not plan to make contributions to our qualified defined benefit pension plans in 2015 through 2017 because none are required using current assumptions