Compensation Plans (Other Cash-Based Awards) (Narrative) (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Awards Under the EIP Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash awards	$ 31	$ 34	$ 52
Other Variable Compensation Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash awards	$ 150	$ 137	$ 290

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration