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Smith Nonqualified Deferred Compensation Plan based on the market price of the Common Stock on April 15, 2020."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The Plan permits the participant to defer the receipt of the award, and Mr. Greubel has made a deferral."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The Plan permits the participant to defer the receipt of the award, and Mr. Greubel has made a deferral."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Restricted Stock Units receive a quarterly dividend pursuant to a dividend reinvestment feature of the A. O. Smith Nonqualified Deferred Compensation Plan.  The total amount of dividends received was 307 units of Restricted Stock Units."}],"balance_after":22939,"derivative":{"exercise_price":40.02,"underlying":"Common Stock","underlying_shares":3249},"source":{"system":"sec-edgar","filing":"0000091142-20-000032","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/91142/000009114220000032/edgar.xml","form_type":"4"}},{"id":3464948,"issuer":{"id":3642,"kind":"organization","name":"SMITH A O CORP"},"owners":[{"id":149822,"kind":"person","name":"GREUBEL WILLIAM P","position":1,"cik":"0001244813","reported_name":"GREUBEL WILLIAM P","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2019-07-10T20:13:46.000Z","date":"2019-07-08","kind":"grant","acquired":true,"shares":55,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Payment of retainer in Restricted Stock Units under the A. 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The total amount of dividends received was 257 units of Restricted Stock Units."}],"balance_after":19250,"derivative":{"exercise_price":54.38,"underlying":"Common Stock","underlying_shares":2299},"source":{"system":"sec-edgar","filing":"0000091142-19-000022","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/91142/000009114219000022/edgar.xml","form_type":"4"}},{"id":3966612,"issuer":{"id":3642,"kind":"organization","name":"SMITH A O CORP"},"owners":[{"id":149822,"kind":"person","name":"GREUBEL WILLIAM P","position":1,"cik":"0001244813","reported_name":"GREUBEL WILLIAM P","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2018-04-10T20:52:02.000Z","date":"2018-04-09","kind":"grant","acquired":true,"shares":1970,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Payment of retainer in Restricted Stock Units under the A. 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The total amount of dividends received was 40 units of Restricted Stock Units."}],"balance_after":16694,"derivative":{"exercise_price":63.48,"underlying":"Common Stock","underlying_shares":1970},"source":{"system":"sec-edgar","filing":"0000091142-18-000036","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/91142/000009114218000036/edgar.xml","form_type":"4"}},{"id":4082946,"issuer":{"id":3642,"kind":"organization","name":"SMITH A O CORP"},"owners":[{"id":149822,"kind":"person","name":"GREUBEL WILLIAM P","position":1,"cik":"0001244813","reported_name":"GREUBEL WILLIAM P","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-02-01T19:31:40.000Z","date":"2018-02-01","kind":"sale","acquired":false,"shares":17856,"price":66.5,"value":1187424.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price in Column 4 is a weighted average price.  The prices actually received ranged from $66.50 to $66.61.  The reporting person has provided to the issuer, and will provide to any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range for all transactions reported on this Form 4 utilizing an average weighted price."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000091142-18-000002","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/91142/000009114218000002/edgar.xml","form_type":"4"}},{"id":4104875,"issuer":{"id":3642,"kind":"organization","name":"SMITH A O CORP"},"owners":[{"id":149822,"kind":"person","name":"GREUBEL WILLIAM P","position":1,"cik":"0001244813","reported_name":"GREUBEL WILLIAM P","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2018-01-08T19:27:19.000Z","date":"2018-01-04","kind":"exercise","acquired":false,"shares":17856,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"The Plan permits the participant to defer the receipt of the award.  Mr Greubel's elected a deferral until 01/01/2014 with a distribution over five years."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The Plan permits the participant to defer the receipt of the award.  Mr Greubel's elected a deferral until 01/01/2014 with a distribution over five years."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The Plan permits the participant to defer the receipt of the award.  Mr Greubel's elected a deferral until 01/01/2014 with a distribution over five years."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"The Plan permits the participant to defer the receipt of the award.  Mr Greubel's elected a deferral until 01/01/2014 with a distribution over five years."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Restricted Stock Units that William P. 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