XML 26 R11.htm IDEA: XBRL DOCUMENT
v3.20.1

Statements Of Consolidated Equity (Parenthetical) $ in Millions | Mar. 31, 2020 USD ($)
--- | ---
Series A Preferred Stock |
Preferred Stock, Liquidation Preference, Value | $ 400
Series B Preferred Stock |
Preferred Stock, Liquidation Preference, Value | $ 500

X
- Definition Value of the difference between preference in liquidation and the par or stated values of the preferred shares. + References No definition available. + Details
Name: | us-gaap_PreferredStockLiquidationPreferenceValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |