Consolidated Statements of Changes in Shareholders' Equity (Parentheticals) - USD ($) $ in Millions	3 Months Ended
Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Common Dividends (Per Share)	$ 0.20	$ 0.20	$ 0.20	$ 0.18	$ 0.18	$ 0.18
Preferred Dividends (Per Share)	$ 10,625	$ 10,625	$ 10,625	$ 10,625	$ 10,625	$ 10,625
Effect of adoption			$ 53
Effect of adoption, tax			$ (186)

New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification, Tax

No definition available.

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- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

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- Definition

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.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Aggregate dividends paid during the period for each share of preferred stock outstanding.

+ References

No definition available.

+ Details

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Data Type:	num:perShareItemType
Balance Type:	na
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