Does a monk’s Step of the Wind affect High Jump or just Long Jump?

At 2nd level, monks can spend a ki point to use Step of the Wind:

Step of the Wind

You can spend 1 ki point to take the Disengage or Dash action as a bonus action on your turn, and your jump distance is doubled for the turn.

What is meant by “jump distance”, exactly?

The rules on Jumping state:

Long Jump. When you make a long jump, you cover a number of feet up to your Strength score if you move at least 10 feet on foot immediately before the jump. When you make a standing long jump, you can leap only half that distance. Either way, each foot you clear on the jump costs a foot of movement. […]

High Jump. When you make a high jump, you leap into the air a number of feet equal to 3 + your Strength modifier (minimum of 0 feet) if you move at least 10 feet on foot immediately before the jump. When you make a standing high jump, you can jump only half that distance. Either way, each foot you clear on the jump costs a foot of movement. […]

You can extend your arms half your height above yourself during the jump. Thus, you can reach above you a distance equal to the height of the jump plus 1 1/2 times your height.

Both Long Jump and High Jump mention distance, so does that mean a monk who uses Step of the Wind can jump twice as high? I ask because my DM and other players in the group who spoke up are under the impression it only affects the Long Jump, and that a High Jump is unaffected by Step of the Wind…