Balance at January 1, 2012 | $ | 12.5 | |
Liabilities incurred | 0.7 | ||
Liabilities settled | — | ||
Accretion expense(1) | 0.8 | ||
Revisions in estimated cash flows | (0.5 | ) | |
Balance at December 31, 2012 | $ | 13.5 | |
Liabilities incurred | 3.1 | ||
Liabilities settled | (0.2 | ) | |
Accretion expense(1) | 1.0 | ||
Revisions in estimated cash flows | 0.5 | ||
Balance at December 31, 2013 | $ | 17.9 | |
(1) | Included in cost of products sold and operating expenses. |