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COMMON STOCK - Additional Information (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Equity [Abstract] |  |  |
Intrinsic value of stock options exercised and restricted stock units vested | $ 323.5 | $ 382.1 | $ 281.1
Cash from exercises of stock options | 79.2 | 110.4 | 103.7
Realized tax benefits from exercises of stock options and vesting of restricted stock units | 72.1 | 85.1 | 62.5
Total grant date fair value of stock options vested | 34.0 | $ 31.2 | $ 29.0
Employee stock purchase subscriptions | $ 140.9 |  |
Weighted-average remaining requisite service period | 30 months |  |

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- Definition Disclosure of aggregate tax benefit realized from the exercise of stock options and vesting of restricted stock units during the period. + References No definition available. + Details
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- Definition This element represents the intrinsic value of stock options exercised and restricted stock units that vested during the period. + References No definition available. + Details
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- Definition Represents the total grant-date fair value of options that vested during the period. + References No definition available. + Details
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- Definition Amount of cost not yet recognized for nonvested award 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 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 cash inflow from exercise of 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 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=SL79508275-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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