A mobile station device that communicates with a base station device using a plurality of serving cells, wherein the plurality of serving cells includes a primary cell and at least one secondary cell, the mobile station device comprising: a receiving unit configured to: receive a first parameter that is used for indicating that simultaneous transmission of Hybrid Automatic Repeat Request-Acknowledgement, HARQ-ACK, and channel state information using a first physical uplink control channel format is allowed; receive a second parameter that is used for indicating that simultaneous transmission of HARQ-ACK and channel state information using a second physical uplink control channel format is allowed; and a determining unit configured to determine, in a case of collision between the HARQ-ACK and the channel state information in a same sub-frame with a physical uplink control channel, the same sub-frame being a sub-frame without a physical uplink shared channel, based on the first parameter, the second parameter, and whether or not a single physical downlink shared channel transmission only on the primary cell indicated by a detection of a single physical downlink control channel is received, whether the channel state information multiplexed with the HARQ-ACK is transmitted using the first physical uplink control channel format, the channel state information multiplexed with the HARQ-ACK is transmitted using the second physical uplink control channel format, or the channel state information is dropped. a receiving unit configured to: receive a first parameter that is used for indicating that simultaneous transmission of Hybrid Automatic Repeat Request-Acknowledgement, HARQ-ACK, and channel state information using a first physical uplink control channel format is allowed; receive a second parameter that is used for indicating that simultaneous transmission of HARQ-ACK and channel state information using a second physical uplink control channel format is allowed; and receive a first parameter that is used for indicating that simultaneous transmission of Hybrid Automatic Repeat Request-Acknowledgement, HARQ-ACK, and channel state information using a first physical uplink control channel format is allowed; receive a second parameter that is used for indicating that simultaneous transmission of HARQ-ACK and channel state information using a second physical uplink control channel format is allowed; and a determining unit configured to determine, in a case of collision between the HARQ-ACK and the channel state information in a same sub-frame with a physical uplink control channel, the same sub-frame being a sub-frame without a physical uplink shared channel, based on the first parameter, the second parameter, and whether or not a single physical downlink shared channel transmission only on the primary cell indicated by a detection of a single physical downlink control channel is received, whether the channel state information multiplexed with the HARQ-ACK is transmitted using the first physical uplink control channel format, the channel state information multiplexed with the HARQ-ACK is transmitted using the second physical uplink control channel format, or the channel state information is dropped.