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Note 13. Common Stock and Stock-based Compensation Stockholders Equity (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 09, 2022 | Sep. 09, 2021
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Treasury Stock, Value | $ 0.7 |  |  |  |  | $ 0.6 |  | $ 0.7 | $ 0.6 |  |  |
Treasury Stock, Value, Acquired, Cost Method |  |  |  |  |  |  |  | 51.8 |  | $ 193.1 |  |
2022 Share Repurchase Program |  |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  |  |  |  | $ 250.0 |
2021-2022 Share Repurchase Program |  |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  |  |  |  |  | $ 250.0
Treasury Stock, Value, Acquired, Cost Method |  |  |  |  |  |  |  |  | 706.6 |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ 21.3 | $ 33.7 | $ 47.8 |  | $ 98.1 | 98.1 | $ 250.0 | $ 21.3 | 98.1 |  |  |
Total Shares Repurchased Under Program | 7,953,336 |  |  |  |  |  |  | 7,953,336 |  |  |  |
Total Shares Repurchased Under Program, Value | $ 228.7 |  |  |  |  |  |  | $ 228.7 |  |  |  |
Accelerated Share Repurchase Program |  |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  | $ 125.0 |  |  | 125.0 |  |  |
Treasury Stock, Shares, Acquired |  |  |  |  |  | 3,300,000 |  |  |  |  |  |
Treasury Stock, Value |  |  |  |  |  | $ 100.0 |  |  | 100.0 |  |  |
Treasury Stock, Value, Acquired, Cost Method |  |  |  |  |  |  |  |  | $ 125.0 |  |  |
Private Share Repurchase Agreement |  |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  |  |  |  |  |  |  |  | 16,900,000 |  |  |
Treasury Stock, Value, Acquired, Cost Method |  |  |  |  |  |  |  |  | $ 472.5 |  |  |
Treasury Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  |  |  |  |  |  |  | 2,000,000.0 | 28,500,000 | 9,300,000 |  |
Treasury Stock, Value, Acquired, Cost Method |  |  |  |  |  |  |  | $ 51.8 | $ 806.6 | $ 193.1 |  |
Treasury Stock [Member] | 2021-2022 Share Repurchase Program |  |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired | 427,383 | 610,000 | 1,760,462 |  | 0 | 5,155,491 | 0 | 2,800,000 | 25,200,000 |  |  |
Treasury Stock, Value, Acquired, Cost Method | $ 12.4 | $ 14.1 | $ 50.3 | [1] | $ 0.0 | $ 151.9 | $ 0.0 | $ 76.8 | $ 706.6 |  |  |
Treasury Stock [Member] | Accelerated Share Repurchase Program |  |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  |  | 760,602 |  |  |  |  | 800,000 | 3,300,000 |  |  |
Treasury Stock, Value, Acquired, Cost Method |  |  | $ 25.0 |  |  |  |  | $ 25.0 | $ 100.0 |  |  |
[1] | Share repurchases during the second quarter of 2022 included 760,602 shares at a cost of $25.0 million representing the final settlement of the ASR, which was funded in December 2021 but a portion of which remained outstanding as of December 31, 2021.

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