| Outlook | Effective |
| Stable | 22.02.2019 |
| Foreign Currency LT Debt | Effective |
| BBB | 22.02.2019 |
| BBB- | 20.05.2016 |
| BB+ | 22.05.2015 |
| BBB- | 23.12.2010 |
| BBB | 10.11.2008 |
| BBB+ | 06.12.2005 |
| A- | 30.11.2000 |
| BBB+ *P | 01.10.2000 |
| BBB+ | 29.10.1999 |
| BBB | 24.06.1997 |
| BBB- | 25.04.1996 |
If *P or *N = rating is likely to move up (Positive) or down (Negative)