pre_text: (d) Product Warranties The following table summarizes the activity related to the product warranty liability (in millions): We accrue for warranty costs as part of our cost of sales based on associated material product costs, labor costs for technical support staff, and associated overhead. Our products are generally covered by a warranty for periods ranging from 90 days to five years, and for some products we provide a limited lifetime warranty.
table: July 27, 2019 July 28, 2018 July 29, 2017
table: Balance at beginning of fiscal year $359 $407 $414
table: Provisions for warranties issued 600 582 691
table: Adjustments for pre-existing warranties (12) (38) (21)
table: Settlements (603) (592) (677)
table: Acquisitions and divestitures (2) — —
table: Balance at end of fiscal year $342 $359 $407
question: Analyse this data from a financial earnings document. What was the change in Provisions for warranties issued between 2017 and 2018?