XML 51 R39.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Postretirement Benefit Plans (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2017
Retirement Benefits [Abstract] |
Defined Contribution Plan Disclosures [Table Text Block] | The following table sets forth the net periodic benefit cost for the Company’s other postretirement benefit plans. The amounts for the three and nine months ended September 30, 2017 are based on calculations prepared by the Company's actuaries and represent the Company’s best estimate of each period’s proportionate share of the amounts to be recorded for the year ending December 31, 2017.
| Three Months Ended September 30, | Nine Months Ended September 30,
| 2017 | 2016 | 2017 | 2016
Components of net periodic benefit cost: |  |  |  |
Service cost | $ | — |  | $ | 0.1 |  | $ | 0.1 |  | $ | 0.3 |
Interest cost | 2.3 |  | 2.7 |  | 6.8 |  | 8.2 |
Expected return on plan assets | (1.4 | ) | (1.6 | ) | (4.2 | ) | (4.9 | )
Amortization of prior service cost | (0.3 | ) | 0.2 |  | (0.8 | ) | 0.7 |
Net periodic benefit cost | $ | 0.6 |  | $ | 1.4 |  | $ | 1.9 |  | $ | 4.3 |

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of defined contribution pension plans or defined contribution other postretirement plans, separately for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanDisclosuresTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration