The amount of the cost recognized during the period for multiemployer plans.

No definition available.

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- Definition

For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Accumulated Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6503844

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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- Definition

Amount included in accumulated other comprehensive income (AOCI) related to gain (loss) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position.

+ References

No definition available.

+ Details

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- Definition

Amount included in accumulated other comprehensive income (AOCI) related to prior service cost (credit) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position.

+ References

No definition available.

+ Details

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- Definition

The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (l)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Health Care Cost Trend Rate

-URI http://asc.fasb.org/extlink&oid=6514820

+ Details

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- Definition

Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.

+ References

+ Details

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- Definition

The ultimate trend rate for health care costs.

+ References

+ Details

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- Details

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- Definition

The amount of the cost recognized during the period for defined contribution 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=6414718&loc=d3e28014-114942

+ Details

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

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- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

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- Definition

Amount before tax of (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption and increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e637-108580

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 10A

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669646-108580

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)(4)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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Retirement Benefits - Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Benefit Plans [Abstract]
Multiemployer Pension Expense		$ 0.2	$ 0.3	$ 0
Matching defined contribution expense		5.5	7.1	20.8
Defined contribution plan employer matching contribution percent	100.00%		100.00%	125.00%
Defined contribution plan maximum annual contribution per employee percent	4.00%		1.00%	5.00%
US Plans [Member]
Amounts in AOCI to be recognized in retirement cost in next fiscal year [Abstract]
Accumulated benefit obligation		934.9	1,031.3
UMWA obligation increase due to "Cadillac" plan excise tax		123.1	(23.1)
Non-US Plans [Member]
Amounts in AOCI to be recognized in retirement cost in next fiscal year [Abstract]
Accumulated benefit obligation		345.3	345.1
Estimated contributions		27.3
UMWA obligation increase due to "Cadillac" plan excise tax		11.7	(32.4)
UMWA Plans Postretirement Medical [Member]
Amounts in AOCI to be recognized in retirement cost in next fiscal year [Abstract]
UMWA obligation increase due to "Cadillac" plan excise tax		(56.7)	(6.3)
Retirement Benefit Plan Remeasurements [Abstract]
Black lung health care cost trend rate		7.00%	7.00%
Black lung health care cost ultimate rate		5.00%	5.00%
Black Lung And Other Plans Postretirement [Member]
Amounts in AOCI to be recognized in retirement cost in next fiscal year [Abstract]
UMWA obligation increase due to "Cadillac" plan excise tax		0.8	(2.2)
Retirement Benefit Plan Remeasurements [Abstract]
Black lung health care cost trend rate		5.00%
Pension plan [Member]
Amounts in AOCI to be recognized in retirement cost in next fiscal year [Abstract]
Net Gains Losses to be recognized in retirement cost next fiscal year		30.9
Net Prior Service Cost Credit to be recognized in retirement cost next fiscal year		0.8
UMWA obligation increase due to "Cadillac" plan excise tax		134.8	(55.5)
Retirement benefits other than pension [Member]
Amounts in AOCI to be recognized in retirement cost in next fiscal year [Abstract]
Net Gains Losses to be recognized in retirement cost next fiscal year		15.2
Net Prior Service Cost Credit to be recognized in retirement cost next fiscal year		2.9
UMWA obligation increase due to "Cadillac" plan excise tax		(55.9)	(8.5)
Primary U.S. retirement plan [Member]
Amounts in AOCI to be recognized in retirement cost in next fiscal year [Abstract]
Estimated contributions		25.9
Nonqualified U.S. pension plan [Member]
Amounts in AOCI to be recognized in retirement cost in next fiscal year [Abstract]
Estimated contributions		0.8
Us Definded Contribtution Expense [Member]
Other Benefit Plans [Abstract]
Matching defined contribution expense		2.6	4.6	16.9
Other Defined Contribution Plans Expense [Member]
Other Benefit Plans [Abstract]
Matching defined contribution expense		2.9	2.5	3.9
UMWA Excise Tax [Member]
Amounts in AOCI to be recognized in retirement cost in next fiscal year [Abstract]
UMWA obligation increase due to "Cadillac" plan excise tax		$ 22.9	$ 31.0
Canada Plan [Member]
Retirement Benefit Plan Remeasurements [Abstract]
Black lung health care cost trend rate		7.00%
Black lung health care cost ultimate rate		5.00%
Brazil Plan [Member]
Retirement Benefit Plan Remeasurements [Abstract]
Black lung health care cost trend rate		3.00%