| Rating | Agency | Rating Description | Term | RankInScale |
|---|---|---|---|---|
| Aaa | Moody's | Prime | Long-term | 1 |
| Aa1 | Moody's | High grade | Long-term | 2 |
| Aa2 | Moody's | High grade | Long-term | 3 |
| Aa3 | Moody's | High grade | Long-term | 4 |
| A1 | Moody's | Upper medium grade | Long-term | 5 |
| A2 | Moody's | Upper medium grade | Long-term | 6 |
| A3 | Moody's | Upper medium grade | Long-term | 7 |
| Baa1 | Moody's | Lower medium grade | Long-term | 8 |
| Baa2 | Moody's | Lower medium grade | Long-term | 9 |
| Baa3 | Moody's | Lower medium grade | Long-term | 10 |