The PH of laundry detergents is between 7 and 10. Most detergents have a PH closer to 9. This makes laundry detergents either neutral or basic in their solutions. If detergents were acidic, they would be more harmful to the fabric.
Neutral detergents are not neccesarily at pH 7, and I know of no legal restriction (at least in the EU) on labelling detergents as neutral based on pH. For example, claims protection for a set of neutral detergent formulae with pH of "from about 5.5 to about 8.5".