In LT1994 by 150 diff load and 3.3 single supply yo can see this:
At the right side of picture you see "power". It says 23.1mA into Vcc! and 18.8mA from Vee!
First OpAmp must sink current from Vcc not sourcing to it!!!! secound why these (from and to Vcc and Vee) are different? Third I must consider only Vcc for determining regulator current rating?
Also I have simulated it in Ltspice and I had seen that it sink from Vcc and source to Vee. but I don't know why the max Icc=23.1mA is not equal to Iee=-21.4mA.