Debt (Components of Total Indebtedness) (Details) - USD ($)	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Principal Amount	$ 8,487,753,000		$ 8,348,775,000
Carrying Amount	8,404,122,000		8,258,419,000
Less current portion, net	34,150,000		34,150,000
Principal amount of total long-term debt, less current portion, net	8,453,603,000		8,314,625,000
Carrying amount of total long-term debt, less current portion, net	8,369,972,000		8,224,269,000
Fair value of long term debt	$ 7,400,000,000		$ 7,200,000,000
7.25% Senior Notes due 2022
Debt Instrument [Line Items]
Effective interest rate (as percent)	7.25%		7.91%
Principal Amount	$ 8,294,000		$ 400,000,000
Carrying Amount	$ 8,294,000		$ 392,947,000
Interest rate (as percent)	7.25%	7.25%
5.75% Senior Notes due 2022
Debt Instrument [Line Items]
Effective interest rate (as percent)	5.75%		6.04%
Principal Amount	$ 182,479,000		$ 700,000,000
Carrying Amount	$ 182,462,000		$ 694,464,000
Interest rate (as percent)	5.75%	5.75%
5.375% Senior Notes due 2023
Debt Instrument [Line Items]
Effective interest rate (as percent)	5.62%		5.62%
Principal Amount	$ 210,440,000		$ 750,000,000
Carrying Amount	$ 208,807,000		$ 743,438,000
Interest rate (as percent)	5.375%
6.00% Senior Notes due 2023
Debt Instrument [Line Items]
Effective interest rate (as percent)	6.28%		6.28%
Principal Amount	$ 1,439,840,000		$ 1,635,000,000
Carrying Amount	$ 1,425,407,000		$ 1,616,817,000
Interest rate (as percent)	6.00%
5.875% Senior Secured Notes due 2024
Debt Instrument [Line Items]
Effective interest rate (as percent)	6.14%		6.14%
Principal Amount	$ 300,000,000		$ 300,000,000
Carrying Amount	$ 296,351,000		$ 296,062,000
Interest rate (as percent)	5.875%
6.00% Senior Notes due 2025
Debt Instrument [Line Items]
Effective interest rate (as percent)	6.27%		6.27%
Principal Amount	$ 1,200,000,000		$ 1,200,000,000
Carrying Amount	$ 1,184,554,000		$ 1,183,415,000
Interest rate (as percent)	6.00%
7.50% Senior Secured Notes due 2027
Debt Instrument [Line Items]
Effective interest rate (as percent)	7.71%
Principal Amount	$ 1,500,000,000	$ 1,500,000,000.0	$ 0
Carrying Amount	$ 1,481,316,000		$ 0
Interest rate (as percent)	7.50%
Term Loan B Facility Due 2024
Debt Instrument [Line Items]
Effective interest rate (as percent)	6.96%		7.02%
Principal Amount	$ 3,346,700,000		$ 3,363,775,000
Carrying Amount	$ 3,316,931,000		$ 3,331,276,000
Revolving Credit Facility
Debt Instrument [Line Items]
Effective interest rate (as percent)	4.94%
Principal Amount	$ 300,000,000		$ 0
Carrying Amount	$ 300,000,000		$ 0

Debt Instrument, Face Amount, Excluding Current Maturities

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

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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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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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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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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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