Gellman Marketing Corporation reported the following stockholders’ equity at December 31 (adapted and in millions):
Common stock.................................. $ 256
Additional paid-in capital.................. 286
Retained earnings.............................. 2,190
Treasury stock................................... (690)
Total stockholders’ equity ............... $2,042

During the next year, Gellman Marketing purchased treasury stock at a cost of $22 million and resold treasury stock for $15 million (this treasury stock had cost Gellman Marketing $4 million).
Record the purchase and resale of Gellman Marketing’s treasury stock. Overall, how much did stockholders’ equity increase or decrease as a result of the two treasury stock transactions?