Long-Term Debt - Fair Value of Long-Term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument
Carrying Value	$ 17,244,193	$ 17,147,844
Fair Value	18,566,073	18,451,764
Unamortized debt discount on the Convertible Notes	(947,239)	(752,386)
Unamortized deferred financing costs and debt	(49,315)	(52,704)
Capital Lease obligations	112,967	140,885
Total long-term debt and capital lease obligations (including current portion)	$ 16,360,606	16,483,639
4 5/8% Senior Notes due 2017
Debt Instrument
Carrying Value		900,000
Fair Value		$ 913,887
Interest rate (as a percent)	4.625%	4.625%
4 1/4% Senior Notes due 2018
Debt Instrument
Carrying Value	$ 1,200,000	$ 1,200,000
Fair Value	$ 1,212,540	$ 1,228,464
Interest rate (as a percent)	4.25%	4.25%
7 7/8% Senior Notes due 2019
Debt Instrument
Carrying Value	$ 1,400,000	$ 1,400,000
Fair Value	$ 1,531,992	$ 1,559,698
Interest rate (as a percent)	7.875%	7.875%
5 1/8% Senior Notes due 2020
Debt Instrument
Carrying Value	$ 1,100,000	$ 1,100,000
Fair Value	$ 1,155,638	$ 1,141,866
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	$ 2,201,800	$ 2,178,880
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	$ 2,131,660	$ 2,114,780
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	$ 1,540,290	$ 1,500,315
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	$ 2,095,260	$ 2,064,000
Interest rate (as a percent)	5.875%	5.875%
2 3/8% Convertible Notes due 2024
Debt Instrument
Carrying Value	$ 1,000,000
Fair Value	$ 992,060
Interest rate (as a percent)	2.375%
7 3/4% Senior Notes due 2026
Debt Instrument
Carrying Value	$ 2,000,000	$ 2,000,000
Fair Value	$ 2,295,840	$ 2,270,900
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	$ 3,364,800	$ 3,431,130
Interest rate (as a percent)	3.375%	3.375%
Other notes payable
Debt Instrument
Carrying Value	$ 44,193	$ 47,844
Fair Value	$ 44,193	$ 47,844

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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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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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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