As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL AT 150 KNOTS, THE CAPTAIN'S WINDSHIELD CRACKED VERTICALLY FROM TOP TO BOTTOM THEN CONTINUED CRACKING IN THE UPPER LEFT CORNER. AN EMERGENCY WAS DECLARED. THE AIRCRAFT RETURNED TO DTW AND LANDED OVERWEIGHT WITHOUT INCIDENT. MAINTENANCE REPLACED THE WINDSHIELD. OPERATIONAL CHECK OK.