Employee Benefits Plans (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension expense from continuing operations
Pension lump sum settlement expense	$ 97,231	$ 0	$ 0
Amortization of:
Postretirement benefit (income) expense	138,656	48,118	49,413
Company Administered Plan [Member]
Pension expense from continuing operations
Service cost	13,023	15,991	15,479
Interest cost	100,909	89,682	94,605
Expected return on plan assets	(115,410)	(106,150)	(96,342)
Pension lump sum settlement expense	97,231	0	0
Actuarial gain	0	(3,905)	0
Amortization of:
Net actuarial loss (gain)	23,573	35,282	31,200
Prior service credit	(1,788)	(1,818)	(2,275)
Postretirement benefit (income) expense	117,538	36,892	42,667
Company Administered Plan [Member] \| Pension Expense U.S. [Member]
Amortization of:
Postretirement benefit (income) expense	118,797	37,636	38,992
Company Administered Plan [Member] \| Pension Expense Foreign [Member]
Amortization of:
Postretirement benefit (income) expense	(1,259)	(744)	3,675
Union Administered Plan [Member]
Amortization of:
Postretirement benefit (income) expense	$ 21,118	$ 11,226	$ 6,746

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Defined benefit plan, lump sum settlement charge, pre tax

+ References

No definition available.

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- Definition

Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Gain or Loss

-URI http://asc.fasb.org/extlink&oid=6514294

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

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-Subparagraph (a)(4)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

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-Glossary Gain or Loss

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The amount of gains or losses recognized in net periodic benefit cost.

+ References

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- Definition

The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation.

+ References

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- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Expected Return on Plan Assets

-URI http://asc.fasb.org/extlink&oid=6512136

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-Name Accounting Standards Codification

-Topic 715

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- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

+ References

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- Definition

The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

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- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

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