Debt Instrument, Extension Period

No definition available.

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- Definition

Debt Instrument, Interest Rate, Stated Percentage Increase

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Redemption Price, Amount

+ References

No definition available.

+ Details

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

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.

+ 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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: 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(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

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-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The average effective interest rate during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
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-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Period Type:	duration

- Definition

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

+ References

+ Details

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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.

+ Details

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
-Paragraph 28
-Subparagraph (b)
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+ Details

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Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Period Type:	instant

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of long-term unsecured obligations issued by corporations and other borrowers to investors (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 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19,20,22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Debt (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
Debt (Narrative) (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2017	May 31, 2017
Debt Instrument [Line Items]
Principal amount	$ 3,866,317,000	$ 3,866,317,000	$ 3,380,827,000
Loss on extinguishment of debt		0	(10,000,000)	$ 0
Maximum borrowing capacity	1,000,000,000	1,000,000,000
Term Loan
Debt Instrument [Line Items]
Principal amount					$ 350,000,000
Notes due September 2020 \| Notes due
Debt Instrument [Line Items]
Principal amount	$ 300,000,000	$ 300,000,000	0		300,000,000
Interest rate	3.625%	3.625%
Debt face amount	$ 200,000,000	$ 200,000,000
Interest rate during period	2.78%
Notes due September 2020 \| Notes due \| Eurodollar
Debt Instrument [Line Items]
Basis Spread on variable rate		1.50%
Notes due April 2023 \| Notes due
Debt Instrument [Line Items]
Principal amount	$ 400,000,000	$ 400,000,000	0		$ 400,000,000
Interest rate	4.70%	4.70%
Debt due 2018 \| Notes due
Debt Instrument [Line Items]
Debt face amount	$ 150,000,000	$ 150,000,000
Extension period		1 year
Interest rate during period	2.49%
Debt due 2018 \| Notes due \| Eurodollar
Debt Instrument [Line Items]
Basis Spread on variable rate		1.125%
Notes due May 2022 \| Notes due
Debt Instrument [Line Items]
Principal amount	$ 400,000,000	$ 400,000,000	0
Interest rate	4.125%	4.125%				3.875%
Percentage increase	0.25%	0.25%
Notes due June 2017 \| Notes due
Debt Instrument [Line Items]
Debt face amount	$ 150,000,000	$ 150,000,000
Notes due September 2017 \| Notes due
Debt Instrument [Line Items]
Principal amount	$ 0	$ 0	385,109,000
Interest rate	5.75%	5.75%
Debt face amount	$ 385,000,000	$ 385,000,000
Notes due May 2018 \| Notes due
Debt Instrument [Line Items]
Principal amount	$ 0	$ 0	350,000,000
Interest rate	4.75%	4.75%
Debt face amount	$ 350,000,000	$ 350,000,000
Loss on extinguishment of debt		4,000,000
Notes due January 2037 \| Notes due
Debt Instrument [Line Items]
Principal amount	$ 35,841,000	$ 35,841,000	115,041,000
Interest rate	5.25%	5.25%
Debt redemption	$ 79,000,000	$ 79,000,000
Notes due October 2021 \| Notes due
Debt Instrument [Line Items]
Principal amount	$ 600,000,000	$ 600,000,000	600,000,000
Interest rate	3.625%	3.625%
Percentage increase	0.25%	0.25%
Commercial Paper
Debt Instrument [Line Items]
Commercial paper	$ 0	$ 0	$ 0