0001304280 2025-04-01 2026-03-31 0001304280 2025-09-30 0001304280 2026-06-16 iso4217:USD shares 0001304280 false 2026 FY 2026-03-31 --03-31 10-K/A true 2026-03-31 --03-31 false 001-32312 Novelis Inc. Z4 98-0442987 3550 Peachtree Road NE, Suite 1100 Atlanta GA 30326 (404) 760-4000 No Yes No Yes Non-accelerated Filer false false false 0 606333333 <span style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:120%">None</span> 2026-03-31 --03-31 2026-03-31 --03-31 2026-03-31 --03-31 2026-03-31 --03-31 2026-03-31 --03-31 2026-03-31 --03-31 2026-03-31 --03-31