Number of shares that have been repurchased during the period and are being held in treasury.

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
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Name:	us-gaap_TreasuryStockSharesAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Share Repurchases (Details) - USD ($) shares in Millions	3 Months Ended	9 Months Ended
Share Repurchases (Details) - USD ($) shares in Millions	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Oct. 31, 2020
Class of Stock [Line Items]
Payments for repurchase of common stock		$ 750,000,000.0	$ 1,800,000,000
2020 Share Repurchase Program
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount				$ 5,000,000,000
Repurchase of common stock, at cost, shares	2.2		6.0
Payments for repurchase of common stock	$ 750,000,000		$ 1,800,000,000
Amount remaining under 2019 Share Repurchase Program		$ 2,100,000,000