XML 23 R79.htm IDEA: XBRL DOCUMENT
v3.3.0.814

Other Retirement Plans (Schedule of Covered Employees and Contributions, Multi-Employer Plans) (Details) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 USD ($) employee | Sep. 30, 2014 USD ($) employee | Sep. 30, 2015 USD ($) employee | Sep. 30, 2014 USD ($) employee
Covered Employees and Contributions, Multi-Employer Plans [Line Items] |  |  |  |
Multi-employer plans, contributions (in dollars) | $ 9.6 | $ 12.7 | $ 26.6 | $ 29.8
Multi-Employer Plans, Pension [Member] |  |  |  |
Covered Employees and Contributions, Multi-Employer Plans [Line Items] |  |  |  |
Multi-employer plans, contributions (in dollars) | 7.4 | 11.6 | 20.0 | 27.3
Multi-Employer Plans, Postretirement Benefit [Member] |  |  |  |
Covered Employees and Contributions, Multi-Employer Plans [Line Items] |  |  |  |
Multi-employer plans, contributions (in dollars) | $ 2.2 | $ 1.1 | $ 6.6 | $ 2.5
Workforce Subject to Collective Bargaining Arrangements [Member] | Unionized Employees [Member] | Low [Member] |  |  |  |
Covered Employees and Contributions, Multi-Employer Plans [Line Items] |  |  |  |
Multi-employer plans, covered employees (in number of employees) | employee | 1,689 | 2,029 | 590 | 1,098
Workforce Subject to Collective Bargaining Arrangements [Member] | Unionized Employees [Member] | High [Member] |  |  |  |
Covered Employees and Contributions, Multi-Employer Plans [Line Items] |  |  |  |
Multi-employer plans, covered employees (in number of employees) | employee | 2,463 | 2,167 | 2,463 | 2,167

X
- Definition Number of employees eligible to participate in the defined contribution plan or plans described. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanNumberOfEmployeesCovered
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contributions made to multiemployer plans by the employer. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49170332&loc=SL14450702-114947 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=49170332&loc=SL14450691-114947 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=49170332&loc=SL14450657-114947 + Details
Name: | us-gaap_MultiemployerPlanPeriodContributions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_MultiemployerPlansLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_MultiemployerPlanTypeAxis=us-gaap_MultiemployerPlansPensionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MultiemployerPlanTypeAxis=us-gaap_MultiemployerPlansPostretirementBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_WorkforceSubjectToCollectiveBargainingArrangementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_UnionizedEmployeesConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |