Contingencies, Commitments and Guarantees (Asbestos Claims) (Details) (Asbestos Related Claims [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014 Claims	Dec. 31, 2013 Claims	Dec. 31, 2012 Claims
Asbestos Related Claims [Member]
Loss Contingencies [Line Items]
Asbestos personal injury claims at year end	68,460	67,983	65,812
Number of new claims during the year	4,636	5,898	5,303
Settlement payments during the year	$ 46.0	$ 37.0	$ 36.4
Asbestos-related claims liability, ending balance	$ 690

Amount of asbestos claims paid in the current period, before estimated recoveries from reinsurers.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 40

-Section 50

-Paragraph 3

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-URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437

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

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Amount of loss contingency liability.

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

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The total number of new claims filed pertaining to a loss contingency during the period.

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

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Number of pending claims pertaining to a loss contingency.

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