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v3.21.2

Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Millions, $ in Millions | Total | Common Stock | Additional Paid-In Capital | Accumulated Other Comprehensive Income | Accumulated Deficit | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Balance at beginning of period (in shares) at Dec. 31, 2019 |  | 91.6 |  |  |  |
Balance at beginning of period at Dec. 31, 2019 | $ 882.6 | $ 0.1 | $ 1,675.9 | $ 2.3 | $ (695.7) | $ (100.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Issuance of common stock under equity incentive plans (in shares) |  | 0.8 |  |  |  |
Issuance of common stock under equity incentive plans | 0.3 |  | 0.3 |  |  |
Issuance of common stock for Employee Stock Purchase Plan | 6.4 |  | 6.4 |  |  |
Equity component of 2025 Notes issuance, net of issuance costs | 289.4 |  | 289.4 |  |  |
Repurchase and conversions of 2022 Notes (in shares) |  | 3.0 |  |  |  |
Repurchase and conversions of 2022 Notes | 53.2 |  | 53.2 |  |  |
Share-based compensation expense | 54.6 |  | 54.6 |  |  |
Net income | 66.2 |  |  |  | 66.2 |
Other comprehensive loss, net of tax | 1.2 |  |  | 1.2 |  |
Balance at end of period (in shares) at Jun. 30, 2020 |  | 95.4 |  |  |  |
Balance at end of period at Jun. 30, 2020 | 1,353.9 | $ 0.1 | 2,079.8 | 3.5 | (629.5) | (100.0)
Balance at beginning of period (in shares) at Mar. 31, 2020 |  | 92.3 |  |  |  |
Balance at beginning of period at Mar. 31, 2020 | 934.5 | $ 0.1 | 1,706.5 | 3.7 | (675.8) | (100.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Issuance of common stock under equity incentive plans (in shares) |  | 0.1 |  |  |  |
Issuance of common stock under equity incentive plans | 0.0 |  |  |  |  |
Issuance of common stock for Employee Stock Purchase Plan | 0.0 |  |  |  |  |
Equity component of 2025 Notes issuance, net of issuance costs | 289.4 |  | 289.4 |  |  |
Repurchase and conversions of 2022 Notes (in shares) |  | 3.0 |  |  |  |
Repurchase and conversions of 2022 Notes | 53.2 |  | 53.2 |  |  |
Share-based compensation expense | 30.7 |  | 30.7 |  |  |
Net income | 46.3 |  |  |  | 46.3 |
Other comprehensive loss, net of tax | (0.2) |  |  | (0.2) |  |
Balance at end of period (in shares) at Jun. 30, 2020 |  | 95.4 |  |  |  |
Balance at end of period at Jun. 30, 2020 | 1,353.9 | $ 0.1 | 2,079.8 | 3.5 | (629.5) | (100.0)
Balance at beginning of period (in shares) at Dec. 31, 2020 |  | 96.1 |  |  |  |
Balance at beginning of period at Dec. 31, 2020 | 1,826.5 | $ 0.1 | 2,125.3 | 3.2 | (202.1) | (100.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Issuance of common stock under equity incentive plans (in shares) |  | 0.6 |  |  |  |
Issuance of common stock for Employee Stock Purchase Plan | 8.7 |  | 8.7 |  |  |
Share-based compensation expense | 59.6 |  | 59.6 |  |  |
Net income | 103.2 |  |  |  | 103.2 |
Other comprehensive loss, net of tax | (0.4) |  |  | (0.4) |  |
Balance at end of period (in shares) at Jun. 30, 2021 |  | 96.7 |  |  |  |
Balance at end of period at Jun. 30, 2021 | 1,997.6 | $ 0.1 | 2,193.6 | 2.8 | (98.9) | (100.0)
Balance at beginning of period (in shares) at Mar. 31, 2021 |  | 96.7 |  |  |  |
Balance at beginning of period at Mar. 31, 2021 | 1,903.2 | $ 0.1 | 2,162.0 | 2.9 | (161.8) | (100.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Issuance of common stock under equity incentive plans | 0.0 |  |  |  |  |
Issuance of common stock for Employee Stock Purchase Plan | 0.0 |  |  |  |  |
Share-based compensation expense | 31.6 |  | 31.6 |  |  |
Net income | 62.9 |  |  |  | 62.9 |
Other comprehensive loss, net of tax | (0.1) |  |  | (0.1) |  |
Balance at end of period (in shares) at Jun. 30, 2021 |  | 96.7 |  |  |  |
Balance at end of period at Jun. 30, 2021 | $ 1,997.6 | $ 0.1 | $ 2,193.6 | $ 2.8 | $ (98.9) | $ (100.0)

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- Definition Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. 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http://asc.fasb.org/extlink&oid=124434974&loc=SL124442142-165695 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=123454820&loc=SL4568740-111683 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 40 -Section 65 -Paragraph 1 -Subparagraph (e)(3) -URI http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011 Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 45 -Paragraph 5 -Subparagraph (b) -URI 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-URI http://asc.fasb.org/extlink&oid=123459177&loc=SL121830611-158277 Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32136-110900 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 65 -Paragraph 8 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=123459177&loc=SL121830611-158277 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 65 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641 Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 65 -Paragraph 15 -Subparagraph (f)(2) -URI 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(a)(3)(iii)(03) + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant