Long term debt current maturities.

No definition available.

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- Definition

Unamortized debt issuance expense current.

+ References

No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13,16)
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- Definition

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

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.

+ References

No definition available.

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

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).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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Debt - Schedule of Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Mar. 31, 2016
Debt Instrument [Line Items]
Less: Unamortized debt issuance costs	$ (29,760)		$ (32,613)
Less: Current maturities of long-term debt	(249,652)		(299,882)
Long-term debt, net of debt issuance costs	3,795,327		4,040,229
Unamortized debt issuance expense, current	$ 300		100
2.50% Senior Notes due March 2017 [Member]
Debt Instrument [Line Items]
Interest rate on senior notes		2.50%
5.75% Senior Notes due March 2018 [Member]
Debt Instrument [Line Items]
Interest rate on senior notes	5.75%
7.50% Senior Notes due March 2019 [Member]
Debt Instrument [Line Items]
Interest rate on senior notes	7.50%
4.90% Senior Notes due August 2020 [Member]
Debt Instrument [Line Items]
Interest rate on senior notes	4.90%
4.625% Senior Notes due March 2021 [Member]
Debt Instrument [Line Items]
Interest rate on senior notes	4.625%			4.625%
3.95% Senior Notes due March 2022 [Member]
Debt Instrument [Line Items]
Interest rate on senior notes	3.95%
7.75% Senior Notes due January 2024 [Member]
Debt Instrument [Line Items]
Interest rate on senior notes	7.75%
7.70% Senior Notes due April 2025 [Member]
Debt Instrument [Line Items]
Interest rate on senior notes	7.70%
6.20% Senior Notes due August 2040 [Member]
Debt Instrument [Line Items]
Interest rate on senior notes	6.20%
6.05% Senior Notes due March 2041 [Member]
Debt Instrument [Line Items]
Interest rate on senior notes	6.05%
5.25% Senior Notes due March 2042 [Member]
Debt Instrument [Line Items]
Interest rate on senior notes	5.25%
8.70% Senior Notes due April 2045 [Member]
Debt Instrument [Line Items]
Interest rate on senior notes	8.70%
Senior Notes [Member]
Debt Instrument [Line Items]
Total debt	$ 4,074,739		4,372,724
Senior Notes [Member] \| 2.50% Senior Notes due March 2017 [Member]
Debt Instrument [Line Items]
Senior unsecured notes	0		$ 299,992
Interest rate on senior notes			2.50%
Senior Notes [Member] \| 5.75% Senior Notes due March 2018 [Member]
Debt Instrument [Line Items]
Senior unsecured notes	$ 249,911		$ 249,771
Interest rate on senior notes	5.75%
Senior Notes [Member] \| 7.50% Senior Notes due March 2019 [Member]
Debt Instrument [Line Items]
Senior unsecured notes	$ 201,695		201,695
Interest rate on senior notes	7.50%
Senior Notes [Member] \| 4.90% Senior Notes due August 2020 [Member]
Debt Instrument [Line Items]
Senior unsecured notes	$ 167,612		$ 167,576
Interest rate on senior notes	4.90%		4.90%	4.90%
Senior Notes [Member] \| 4.625% Senior Notes due March 2021 [Member]
Debt Instrument [Line Items]
Senior unsecured notes	$ 208,561		$ 208,538
Interest rate on senior notes	4.625%		4.625%
Senior Notes [Member] \| 3.95% Senior Notes due March 2022 [Member]
Debt Instrument [Line Items]
Senior unsecured notes	$ 125,510		$ 125,488
Interest rate on senior notes	3.95%		3.95%
Senior Notes [Member] \| 7.75% Senior Notes due January 2024 [Member]
Debt Instrument [Line Items]
Senior unsecured notes	$ 981,738		$ 980,117
Interest rate on senior notes	7.75%
Senior Notes [Member] \| 7.70% Senior Notes due April 2025 [Member]
Debt Instrument [Line Items]
Senior unsecured notes	$ 448,983		448,909
Interest rate on senior notes	7.70%
Senior Notes [Member] \| 6.20% Senior Notes due August 2040 [Member]
Debt Instrument [Line Items]
Senior unsecured notes	$ 399,899		399,898
Interest rate on senior notes	6.20%
Senior Notes [Member] \| 6.05% Senior Notes due March 2041 [Member]
Debt Instrument [Line Items]
Senior unsecured notes	$ 397,790		397,758
Interest rate on senior notes	6.05%
Senior Notes [Member] \| 5.25% Senior Notes due March 2042 [Member]
Debt Instrument [Line Items]
Senior unsecured notes	$ 498,393		498,369
Interest rate on senior notes	5.25%
Senior Notes [Member] \| 8.70% Senior Notes due April 2045 [Member]
Debt Instrument [Line Items]
Senior unsecured notes	$ 394,647		$ 394,613
Interest rate on senior notes	8.70%