Long-Term Debt and Finance Lease Obligations - Fair Value of Long-Term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument
Carrying Value	$ 14,669,685	$ 14,670,946
Fair Value	13,847,363	14,968,494
Unamortized debt discount on the Convertible Notes	(710,193)	(735,811)
Unamortized deferred financing costs and other debt discounts, net	(26,918)	(28,739)
Finance lease obligations	217,747	233,199
Total long-term debt and capital lease obligations (including current portion)	14,150,321	14,139,595
5 1/8% Senior Notes due 2020
Debt Instrument
Carrying Value	1,100,000	1,100,000
Fair Value	$ 1,097,173	$ 1,110,208
Interest rate (as a percent)	5.125%	5.125%
6 3/4% Senior Notes due 2021
Debt Instrument
Carrying Value	$ 2,000,000	$ 2,000,000
Fair Value	$ 2,022,220	$ 2,109,420
Interest rate (as a percent)	6.75%	6.75%
5 7/8% Senior Notes due 2022
Debt Instrument
Carrying Value	$ 2,000,000	$ 2,000,000
Fair Value	$ 1,973,200	$ 2,129,580
Interest rate (as a percent)	5.875%	5.875%
5% Senior Notes due 2023
Debt Instrument
Carrying Value	$ 1,500,000	$ 1,500,000
Fair Value	$ 1,446,765	$ 1,543,770
Interest rate (as a percent)	5.00%	5.00%
5 7/8% Senior Notes due 2024
Debt Instrument
Carrying Value	$ 2,000,000	$ 2,000,000
Fair Value	$ 1,951,160	$ 2,049,080
Interest rate (as a percent)	5.875%	5.875%
2 3/8% Convertible Notes due 2024
Debt Instrument
Carrying Value	$ 1,000,000	$ 1,000,000
Fair Value	$ 810,000	$ 918,720
Interest rate (as a percent)	2.375%	2.375%
7 3/4% Senior Notes due 2026
Debt Instrument
Carrying Value	$ 2,000,000	$ 2,000,000
Fair Value	$ 2,058,380	$ 2,128,900
Interest rate (as a percent)	7.75%	7.75%
3 3/8% Convertible Notes due 2026
Debt Instrument
Carrying Value	$ 3,000,000	$ 3,000,000
Fair Value	$ 2,418,780	$ 2,907,870
Interest rate (as a percent)	3.375%	3.375%
Other notes payable
Debt Instrument
Carrying Value	$ 69,685	$ 70,946
Fair Value	$ 69,685	$ 70,946

Amount of short-term and long-term debt and lease obligation.

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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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Amount, after accumulated amortization, of debt discount.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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