Preferred and Common Stock (Details) - USD ($) $ in Millions	2 Months Ended	3 Months Ended	9 Months Ended
Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2021	May 07, 2021
Equity [Abstract]
Stock Repurchase Program, Authorized Amount				$ 300
Stock Repurchase Program, Period in Force	2 years
Treasury Stock, Shares, Acquired		2,862,694	3,108,705
Treasury Stock, Value, Acquired, Cost Method		$ (97)	$ (106)

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
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

Reference 3: 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=120397183&loc=d3e187085-122770

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration