Retirement Benefit Plans (Schedule of benefits expected to be paid in next five fiscal years and the five fiscal years thereafter) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Retirement Plans [Member]
Expected benefit payments [Abstract]
2013	$ 8.1
2014	8.6
2015	10.1
2016	10.0
2017	10.8
Thereafter in the succeeding five years	54.8
Medical Plan [Member]
Expected benefit payments [Abstract]
2013	2.5
2014	2.7
2015	2.8
2016	2.8
2017	2.9
Thereafter in the succeeding five years	$ 14.8

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Amount of benefits expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year from a defined benefit 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

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

+ Details

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- Definition

Amount of benefits expected to be paid in the next fiscal year following the latest fiscal year from a defined benefit plan.

+ References

+ Details

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- Definition

Amount of benefits expected to be paid in the fifth fiscal year following the latest fiscal year from a defined benefit plan.

+ References

+ Details

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- Definition

Amount of benefits expected to be paid in the fourth fiscal year following the latest fiscal year from a defined benefit plan.

+ References

+ Details

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- Definition

Amount of benefits expected to be paid in the third fiscal year following the latest fiscal year from a defined benefit plan.

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- Definition

Amount of benefits expected to be paid in the second fiscal year following the latest fiscal year from a defined benefit plan.

+ References

+ Details

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