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Shareholders' Equity Narrative (Details) - USD ($) $ / shares in Units, $ in Billions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Preferred Stock, No Par Value | $ 0 |
Common Stock, Shares Authorized | 1,000,000,000 |
Preferred Stock, Shares Authorized | 500,000 |
Common Stock, No Par Value | $ 0 |
Preferred Stock, Shares Issued | 0 |
Treasury Stock, Shares | 156,600,000 | 160,000,000
Treasury Stock, Value | $ 0.3 |
Common Stock [Member] |  |
Treasury Stock, Value | $ 5.1 | $ 5.2
Reinvested Earnings [Member] |  |
Treasury Stock, Value |  | $ 0.3

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- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 + Details
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