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Derivative Financial Instruments (Details) - USD ($) | Jun. 30, 2019 | Jan. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
--- | --- | --- | --- | ---
Derivative [Line Items] |  |  |  |
Prepaid expenses and other current assets | $ 127,630,000 |  | $ 128,926,000 |
Other assets | 249,039,000 |  | 245,449,000 |
Accrued expenses and other current liabilities | 445,913,000 |  | 427,539,000 | $ 398,079,000
Other liabilities | 297,874,000 |  | $ 234,771,000 |
Derivative, notional amount | 4,225,000,000 | $ 725,000,000 |  |
Interest Rate Cash Flow Hedge Liability at Fair Value | 94,940 |  |  | 20,268
Interest Rate Swap, April 2017 | Not Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, notional amount | 1,000,000,000 |  |  |
Cash Flow Hedging | Interest Rate Swap, June 2018 | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Prepaid expenses and other current assets | 0 |  |  | 6,525
Other assets | 0 |  |  | 1,236
Accrued expenses and other current liabilities | 21,117 |  |  | 1,989
Other liabilities | 73,823 |  |  | $ 26,040
Derivative, notional amount | 1,500,000,000 |  |  |
Cash Flow Hedging | Interest Rate Swap, August 2018 | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, notional amount | 1,000,000,000 |  |  |
Cash Flow Hedging | Interest Rate Swap Three [Member] | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, notional amount | 425,000,000 |  |  |
Cash Flow Hedging | Interest Rate Swap, February 2019 | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, notional amount | $ 300,000,000 |  |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
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