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Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Millions | Common Stock | Treasury Stock | Additional paid-in capital | Retained earnings | Accumulated other comprehensive income (loss), net. | Total
--- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2020 | $ 1.2 | $ (1,250.4) | $ 2,713.3 | $ 1,809.8 | $ 75.0 | $ 3,348.9
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Cash dividends on common stock |  |  |  | (193.3) |  | (193.3)
Stock-based compensation | 0.1 |  | 26.6 |  |  | 26.7
Repurchases of common stock from employee stock plans |  | (6.2) |  |  |  | (6.2)
Purchase of common stock |  | (81.3) |  |  |  | (81.3)
Retirement of treasury stock | (0.2) | 1,231.1 | (1,230.9) |  |  |
Shares issued under employee stock purchase plan |  |  | 0.4 |  |  | 0.4
Net income |  |  |  | 529.0 |  | 529.0
Other comprehensive income (loss) |  |  |  |  | (19.4) | (19.4)
Ending balance at Dec. 31, 2021 | 1.1 | (106.8) | 1,509.4 | 2,145.5 | 55.6 | 3,604.8
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Cash dividends on common stock |  |  |  | (209.4) |  | (209.4)
Stock-based compensation |  |  | 30.7 |  |  | 30.7
Repurchases of common stock from employee stock plans |  | (8.9) |  |  |  | (8.9)
Purchase of common stock |  | (100.9) |  |  |  | (100.9)
Retirement of treasury stock |  | 85.6 | (85.6) |  |  |
Shares issued under employee stock purchase plan |  |  | 0.6 |  |  | 0.6
Net income |  |  |  | 235.0 |  | 235.0
Other comprehensive income (loss) |  |  |  |  | (86.6) | (86.6)
Ending balance at Dec. 31, 2022 | 1.1 | (131.0) | 1,455.1 | 2,171.1 | (31.0) | 3,465.3
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Cash dividends on common stock |  |  |  | (223.5) |  | (223.5)
Stock-based compensation |  |  | 41.3 |  |  | 41.3
Repurchases of common stock from employee stock plans |  | (13.9) |  |  |  | (13.9)
Purchase of common stock |  | (83.9) |  |  |  | (83.9)
Retirement of treasury stock |  | 218.3 | (34.5) | (183.8) |  |
Shares issued under employee stock purchase plan |  |  | 16.7 |  |  | 16.7
Net income |  |  |  | 761.4 |  | 761.4
Other comprehensive income (loss) |  |  |  |  | 21.6 | 21.6
Ending balance at Dec. 31, 2023 | $ 1.1 | $ (10.5) | $ 1,478.6 | $ 2,525.2 | $ (9.4) | $ 3,985.0

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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481549/505-30-45-1 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration