Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Debt - Long-term Borrowings (Details)	1 Months Ended	12 Months Ended
Debt - Long-term Borrowings (Details)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Aug. 31, 2017 EUR (€)	Jun. 02, 2017 USD ($)	May 16, 2017 USD ($)	Apr. 30, 2016 USD ($)
Debt Instrument [Line Items]
Long-term debt maturing in 2019		$ 301,149,000
Long-term debt maturing in 2020		1,500,375,000
Long-term debt maturing in 2021		281,005,000
Long-term debt maturing in 2022		1,650,268,000
Long-term debt maturing in 2023		272,000
Interest expense on long-term debt		343,119,000	$ 257,350,000	$ 75,509,000
Interest Expense
Debt Instrument [Line Items]
Reduction in interest expense due to amortization of unrealized gain		$ 8,300,000
Designated as Hedging Instrument \| Cash Flow Hedging \| Interest Rate Contract
Debt Instrument [Line Items]
Derivative pretax gain recognized in OCI	$ 87,600,000
Bridge Loan \| Committed Acquisition Financing
Debt Instrument [Line Items]
Maximum borrowing capacity								$ 7,300,000,000
Senior Notes \| New Notes
Debt Instrument [Line Items]
Long-term debt issued							$ 6,000,000,000
Senior Notes \| Exchange Notes
Debt Instrument [Line Items]
Long-term debt issued						$ 1,478,000,000
Debentures \| Floating Rate Loan
Debt Instrument [Line Items]
Long-term debt issued \| €					€ 225,000,000
Debentures \| 0.92% Fixed Rate Loan
Debt Instrument [Line Items]
Long-term debt issued \| €					€ 20,000,000
Interest rate		0.92%			0.919%
Term Loan \| Committed Acquisition Financing
Debt Instrument [Line Items]
Maximum borrowing capacity								$ 2,000,000,000