To efficiently report channel state information in an uplink. A terminal device includes a transmission unit which reports CSI for multiple subframe sets in a first serving cell and CSI for a second serving cell, first CSIs for some of multiple subframe sets for the first serving cell being reported on a PUCCH with a first format, and second CSI for the rest of multiple subframe sets for the first serving cell being reported on a PUCCH with the first format, and in a case that in a certain subframe, the second CSI report collides with the CSI report in the second serving cell, the second CSI and the CSI for the second serving cell being reported on the PUCCH with a second format.