General General (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015
General
Income Tax Expense, Effect of Adoption, Quantification	$ 45

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