Asbestos-Related Liabilities (Summary of Asbestos Claims Cash Payments by Company) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Liability for Asbestos and Environmental Claims [Abstract]
Asbestos-related payments	$ 30	$ 30	$ 28
Settled claims payments (included in asbestos-related payments above)	$ 22	$ 21	$ 21

Amount of asbestos claims paid in the current period, net of reinsurance recoveries.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437

Name:	us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetClaimsPaid
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration