Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The carrying amount as of the balance sheet date for the aggregate of other miscellaneous borrowings owed by the reporting entity.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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Debt - Senior Unsecured Notes (Details) - USD ($)			3 Months Ended
Debt - Senior Unsecured Notes (Details) - USD ($)	Nov. 08, 2018	Jul. 16, 2018	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument
Principal balance on debt			$ 5,708,959,000
Senior unsecured notes			5,260,622,000	$ 5,258,550,000
Other debt			89,223,000	90,785,000
Senior Unsecured Note
Debt Instrument
Principal balance on debt			5,300,000,000
Repayments of debt			0
Senior unsecured notes			$ 0	$ 0
Senior Unsecured Note \| Unsecured Note 5.375%
Debt Instrument
Repayment of senior unsecured notes		$ 700,000,000
Percentage of stated interest rate		5.375%
Loss on extinguishment of debt		$ 44,000,000
Senior Unsecured Note \| Unsecured Debt 3.750%
Debt Instrument
Repayment of senior unsecured notes	$ 450,000,000
Percentage of stated interest rate	3.75%