integrated circuit - When a datasheet specifies output current is it per pin or aggregated for all pins?

When a datasheet specifies something like output current, as with the 74FCT244 or for example, is this referring to the aggregated output current between all pins or the capacity of a single pin ?

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Also, it specifies above for the 74FCT244 that with an output HIGH, the max current is -15mA, while with output LOW the associated current shall be no more than 64mA. Clearly one of these refers to the capacity of the device to source and sink current, but the relationship between current sign and output voltage appears backwards to me. Namely, the datasheet says with a HIGH output then it appears to allude to sinking 15mA (indicated by the negative sign). Similarly, the LOW output voltage has a capacity of 64mA .. sourcing? (positive sign).