pre_text: Information on the reportable segment net revenues and segment operating income are presented below (amounts in millions): (1) Intersegment revenues reflect licensing and service fees charged between segments.
table: Year Ended December 31, 2019
table: Activision Blizzard King Total
table: Segment Revenues
table: Net revenues from external customers $2,219 $1,676 $2,031 $5,926
table: Intersegment net revenues (1) — 43 — 43
table: Segment net revenues $2,219 $1,719 $2,031 $5,969
table: Segment operating income $850 $464 $740 $2,054
table: Year Ended December 31, 2018
table: Activision Blizzard King Total
table: Segment Revenues
table: Net revenues from external customers $2,458 $2,238 $2,086 $6,782
table: Intersegment net revenues (1) — 53 — 53
table: Segment net revenues $2,458 $2,291 $2,086 $6,835
table: Segment operating income $1,011 $685 $750 $2,446
table: Year Ended December 31, 2017
table: Activision Blizzard King Total
table: Segment Revenues
table: Net revenues from external customers $2,628 $2,120 $1,998 $6,746
table: Intersegment net revenues (1) — 19 — 19
table: Segment net revenues $2,628 $2,139 $1,998 $6,765
table: Segment operating income $1,005 $712 $700 $2,417
question: Analyse this data from a financial earnings document. What is the difference in segment operating income between Activision and Blizzard in 2017?