General New Accounting Standards (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2017	Apr. 01, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
New accounting pronouncement, effect of adoption, compensation-stock compensation	$ 26	$ 14

Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

No definition available.

Name:	us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration