Preferred Stock (Schedule of Equity Units) (Parenthetical) (Detail) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
Jun. 14, 2019	Dec. 31, 2019
Capital Unit [Line Items]
Issuance costs	$ 28
Corporate units stock purchase contract liability payments		$ 38
Stock Purchase Contract Liability		212
Preferred Stock
Capital Unit [Line Items]
Issuance costs	14
Recorded dividend		$ 15
Dividends per share		$ 9.479
Common Stock [Member]
Capital Unit [Line Items]
Issuance costs	$ 14

Corporate units present value of stock purchase contract payments.

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Corporate units stock purchase contract liability payments.

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Recorded dividend.

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- Definition

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.

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The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

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The cash outflow for cost incurred directly with the issuance of an equity security.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585

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