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v3.19.3.a.u2

SUBSEQUENT EVENTS (Narrative) (Details) |  | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Feb. 04, 2020 USD ($) | Feb. 21, 2020 shares | Dec. 31, 2019 shares | Dec. 31, 2018 shares | Feb. 10, 2020 USD ($) | Feb. 03, 2020 USD ($) | Feb. 02, 2020 USD ($) | May 03, 2018 USD ($)
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | $ 2,200,000,000
Stock repurchased during period (in shares) | shares |  |  | 0 | 0 |  |  |  |
Secured Debt | Term Loan Facility |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | 900,000,000.0
Revolving Credit Facility |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | 1,300,000,000
Standby Letters of Credit |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | 60,000,000.0
Swingline Loan |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | $ 60,000,000.0
Subsequent Event |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | $ 2,200,000,000 |  |
Stock repurchased during period (in shares) | shares |  | 1,438,615 |  |  |  |  |  |
Subsequent Event | Convertible Debt |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Debt, face amount | $ 575,000,000.0 |  |  |  |  |  |  |
Debt, interest rate | 0.50% |  |  |  |  |  |  |
Debt, initial conversion rate | 13.5739 |  |  |  |  |  |  |
Proceeds intended to be used for payment of convertible note hedge transaction costs | $ 59,700,000 |  |  |  |  |  |  |
Proceeds intended to be used for stock repurchase | 100,000,000.0 |  |  |  |  |  |  |
Proceeds intended to be used to repurchase shares through accelerated share repurchase transaction | 92,400,000 |  |  |  |  |  |  |
Subsequent Event | Convertible Debt | Certain Purchasers |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Proceeds intended to be used for stock repurchase | $ 7,600,000 |  |  |  |  |  |  |
Subsequent Event | Secured Debt | Term Loan Facility |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | 877,500,000 | $ 900,000,000 |
Subsequent Event | Revolving Credit Facility |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | 1,300,000,000 |  |
Debt, repaid principal amount |  |  |  |  | $ 315,000,000.0 |  |  |
Subsequent Event | Standby Letters of Credit |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | 60,000,000 |  |
Subsequent Event | Swingline Loan |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | $ 60,000,000 |  |

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