pre_text: Operating income in the fourth quarter grew on a sequential and year-over-year basis to $460 million compared to $336 million and $443 million in the prior and year-ago quarters, respectively. Operating income
table: Three Months Ended
table: December 31, 2019 September 29, 2019 December 31, 2018
table: (Unaudited, in millions)
table: Operating income $460 $336 $443
table: As percentage of net revenues 16.7% 13.1% 16.8%
question: Analyse this data from a financial earnings document. What is the increase/ (decrease) in Operating income from the period December 31, 2018 to 2019?