Accounting Policies And Disclosures Chapter 11 Filings (Details) $ in Billions	9 Months Ended
Sep. 30, 2015 USD ($) Rate
Reorganizations [Abstract]
Bankruptcy Claims, Number Claims Filed	498
Bankruptcy Claims, Amount of Claims Filed \| $	$ 14.6
Substantial Equityholders Threshold \| Rate	4.75%

The aggregate number of claims filed with the bankruptcy court.

No definition available.

Name:	us-gaap_BankruptcyClaimsNumberClaimsFiled
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration