Debt - Long Term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Long term Debt [Abstract]
Total outstanding principal	$ 7,966,865	$ 8,599,703
Total outstanding debt	7,882,540	8,492,588
Less: current portion	(22,921)	(109,310)
Long-term debt, net of current portion	7,859,619	8,383,278
Notes Payable to Banks [Member] \| Term Loans [Member]
Long term Debt [Abstract]
Total outstanding principal	4,956,865	5,914,703
Unamortized financing costs and (discount) premium	(81,194)	(104,281)
Revolving loans [Member]
Long term Debt [Abstract]
Total outstanding principal	225,000
Senior Subordinated Notes [Member] \| 5.625 % Due 2027 [Member]
Long term Debt [Abstract]
Total outstanding principal	1,785,000	1,785,000
Unamortized financing costs and (discount) premium	6,185	7,121
Senior Subordinated Notes [Member] \| 5.625% Due 2024 [Member]
Long term Debt [Abstract]
Total outstanding principal		900,000
Unamortized financing costs and (discount) premium		$ (9,955)
Senior Subordinated Notes [Member] \| 4.75% Due 2028 [Member]
Long term Debt [Abstract]
Total outstanding principal	1,000,000
Unamortized financing costs and (discount) premium	$ (9,316)

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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Amount of unamortized debt discount (premium) and debt issuance costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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