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Share-Based Compensation Plans (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Oct. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation | $ 33 | $ 26 | $ 29 |
Proceeds from exercise of employee stock options | 19 | $ 20 | $ 13 |
Tax benefit from the exercise of stock options | $ 6 |  |  |
Shares awarded | 262 |  |  |
Shares outstanding | 1,827 | 1,961 |  |
Non-vested options outstanding | 700 | 700 | 600 |
Weighted average grant date fair value | $ 84.66 | $ 74.00 | $ 69.30 |
Aggregate intrinsic value of outstanding stock options | $ 102 |  |  |
Aggregate intrinsic value of exercisable stock options | 79 |  |  |
Total intrinsic value of options exercised | 27 | $ 20 | $ 15 |
Stock Options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unamortized compensation expense | $ 7 |  |  |
Weighted average period | 1 year 8 months 12 days |  |  |
Restricted Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unamortized compensation expense | $ 23 |  |  |
Weighted average period | 1 year 9 months 18 days |  |  |
Shares awarded | 230 |  |  |
Performance Based Shares |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unamortized compensation expense | $ 13 |  |  |
Weighted average period | 2 years 6 months |  |  |
Requisite service periods | 3 years |  |  |
Target payout percentage | 100.00% |  |  |
2011 Omnibus Incentive Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Shares initially available for awards |  |  |  | 18,000
Shares available for future grant | 4,000 |  |  |

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Amount of cost to be recognized for option under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Amount of tax benefit from exercise of option under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=SL79508275-113901 + Details
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