Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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-Section 50
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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.

+ References

No definition available.

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- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

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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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- 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

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(b),22(b))
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- Definition

The cash outflow from the repayment of long-term borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in case of liquidation of the entity's assets or underlying collateral.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
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Long-Term and Other Debt - Additional Information (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Debt Instrument
Cash paid to retire debt				$ 39,900,000	$ 0
Gain on early extinguishment of debt	$ 0		$ 0	25,200,000	$ 0
Fair value of debt	7,976,000,000			7,976,000,000		$ 6,931,600,000
Revolver, varying interest rate, due 2018 \| Revolving credit facility
Debt Instrument
Line of credit facility, maximum borrowing capacity	592,600,000.0			592,600,000.0
Revolver, varying interest rate, due 2018 \| Letter of credit
Debt Instrument
Line of credit facility, maximum borrowing capacity	$ 350,000,000.0			$ 350,000,000.0
2020 Notes
Debt Instrument
Principal amount of repurchased debt		$ 56,500,000
Cash paid to retire debt		34,200,000
2021 Notes
Debt Instrument
Principal amount of repurchased debt		9,400,000
Cash paid to retire debt		5,700,000
Gain on early extinguishment of debt		25,200,000
Unamortized debt write off		$ 800,000