Earnings Per Share (Narrative) (Details) $ / shares in Units, $ in Millions	3 Months Ended
Mar. 31, 2019 USD ($) $ / shares shares
Earnings Per Share [Abstract]
Treasury stock acquired (in shares) \| shares	5,260,687
Treasury stock acquired \| $	$ 21
Treasury stock acquired, average cost per share (in dollars per share) \| $ / shares	$ 3.84

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration