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=109259400&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-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=27012166&loc=d3e187085-122770

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

Capital Transactions - Repurchase Programs (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Jan. 31, 2019	Feb. 02, 2017
Share Repurchase Program 2019
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, dollar amount authorized		$ 1,500,000,000
Cost of common stock repurchased under the stock repurchase program	$ 0
Repurchase of shares of common stock (in shares)	0
Share Repurchase Program 2017
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, dollar amount authorized			$ 1,000,000,000
Cost of common stock repurchased under the stock repurchase program	$ 0
Repurchase of shares of common stock (in shares)	0