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DEBT - Narrative (Details) - USD ($) |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 02, 2017 | Dec. 15, 2016 | Sep. 30, 2017 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016 | Mar. 31, 2017 | Mar. 30, 2017 | Jul. 31, 2015 | Jun. 15, 2011
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 2,200,000,000.0 | $ 1,500,000,000 |  |
Borrowings under senior credit facility |  |  |  | $ 571,383,000 | $ 15,000,000 |  |  |  |  |
Stock called during period (in shares) |  | 2,900,000 |  |  |  |  |  |  |  |
Stock called during period, value |  | $ 123,100,000 |  |  |  |  |  |  |  |
Treasury stock, average cost per share (in dollars per share) |  |  |  | $ 41.77 |  | $ 41.78 |  |  |  |
Treasury stock |  |  | $ 121,800,000 | $ 121,800,000 |  | $ 123,100,000 |  |  |  |
Convertible Debt |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Strike price of the call transaction (in dollars per share) |  |  |  |  |  |  |  |  | $ 26.42 | $ 28.72
Strike price of warrant transactions (in dollars per share) |  |  |  |  |  |  |  |  | $ 32.22 | $ 35.03
Warrants exercised (in shares) |  |  | 2,089,802 | 8,707,202 |  |  |  |  |  |
Stock exercised during the period, exercise of warrants (in shares) |  |  | 946,323 | 2,839,743 |  |  |  |  |  |
Warrants outstanding (in shares) |  |  | 0 | 0 |  |  |  |  |  |
Designated as Hedging Instrument | Cash Flow Hedging |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Notional amounts |  |  | $ 400,000,000 | $ 400,000,000 |  |  |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | 1,000,000,000 |  |  |
Line of credit facility outstanding |  |  | $ 671,400,000 | $ 671,400,000 |  | $ 165,000,000 |  |  |  |
Weighted average interest rate on debt |  |  | 2.90% | 2.90% |  | 2.20% |  |  |  |
Revolving Credit Facility | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Line of credit facility, fair value of amount outstanding |  |  | $ 658,700,000 | $ 658,700,000 |  |  |  |  |  |
Standby Letters of Credit |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | 60,000,000 |  |  |
Swingline Loan |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | 60,000,000 |  |  |
Senior Credit Facility |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Cash balance threshold above which excess amount is not subject to any restriction of use or investment |  |  | 40,000,000 | 40,000,000 |  |  |  |  |  |
Incremental financing costs |  |  | 1,100,000 | 1,100,000 |  |  |  |  |  |
Available borrowings under senior secured revolving credit facility |  |  | 1,000,000,000 | $ 1,000,000,000 |  |  |  |  |  |
Senior Credit Facility | Minimum |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Line of credit, commitment fee percentage |  |  |  | 0.15% |  |  |  |  |  |
Senior Credit Facility | Maximum |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Line of credit, commitment fee percentage |  |  |  | 0.35% |  |  |  |  |  |
Senior Credit Facility | Eurodollar | Minimum |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rates available to the Company at its option |  |  |  | 1.00% |  |  |  |  |  |
Senior Credit Facility | Eurodollar | Maximum |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rates available to the Company at its option |  |  |  | 2.00% |  |  |  |  |  |
Senior Credit Facility | Federal Funds |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rates available to the Company at its option |  |  |  | 0.50% |  |  |  |  |  |
Senior Credit Facility | One Month Eurodollar Rate |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rates available to the Company at its option |  |  |  | 1.00% |  |  |  |  |  |
Senior Credit Facility | Standby Letters of Credit |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Line of credit facility outstanding |  |  | 0 | $ 0 |  |  |  |  |  |
Letters of credit outstanding |  |  | 600,000 | 600,000 |  | $ 600,000 |  |  |  |
Term Loan A | Designated as Hedging Instrument | Cash Flow Hedging |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Notional amounts |  |  | 400,000,000.0 | 400,000,000.0 |  | 150,000,000.0 |  |  |  |
Term Loan A | Secured Debt |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | 500,000,000 |  |  |
Line of credit facility outstanding |  |  | $ 500,000,000 | $ 500,000,000 |  | $ 500,000,000 |  |  |  |
Weighted average interest rate on debt |  |  | 2.80% | 2.80% |  | 2.20% |  |  |  |
Term Loan A | Secured Debt | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Line of credit facility, fair value of amount outstanding |  |  | $ 490,000,000 | $ 490,000,000 |  |  |  |  |  |
Term Loan A-1 | Secured Debt |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 700,000,000 |  |  |
Line of credit facility outstanding |  |  | 0 | 0 |  |  |  |  |  |
Available borrowings under senior secured revolving credit facility |  |  | $ 700,000,000 | $ 700,000,000 |  |  |  |  |  |
Term Loan A-1 | Secured Debt | Subsequent Event |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Borrowings under senior credit facility | $ 700,000,000 |  |  |  |  |  |  |  |  |
2016 Convertible Senior Notes | Convertible Debt |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate on debt |  | 1.625% |  |  |  |  |  |  |  |
Repayments of convertible debt |  | $ 227,100,000 |  |  |  |  |  |  |  |
Shares issued during period (in shares) |  | 2,900,000 |  |  |  |  |  |  |  |
Fair value of stock issued |  | $ 122,000,000 |  |  |  |  |  |  |  |
Gain (loss) on extinguishment of debt |  | $ 0 |  |  |  |  |  |  |  |
Debt instrument, principal |  |  |  |  |  |  |  |  |  | $ 230,000,000.0

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