Maximum Percent of Debt to Total Capitalization Ratio

No definition available.

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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.

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- Definition

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

+ 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(a)(1))
-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.

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No definition available.

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- Definition

Fair value amount of debt instrument that was repurchased.

+ 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

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any 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))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Fair value of the amount outstanding under the credit facility.

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

Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04.(a))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04.(a))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

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-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Debt (Details) - USD ($)	6 Months Ended
Debt (Details) - USD ($)	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Debt Instrument [Line Items]
Gain (Loss) on Extinguishment of Debt	$ 260,800,000	$ (33,500,000)
Debt Instrument, Repurchased Face Amount	940,200,000
Debt Instrument, Repurchase Amount	684,800,000
Five Point Two Percent Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal after Year Five	669,300,000
Debt Instrument, Repurchased Face Amount	$ 30,700,000
Debt Instrument, Interest Rate, Stated Percentage	5.20%		5.20%
Debt Instrument, Repurchase Amount	$ 16,800,000
Senior Notes [Member]
Debt Instrument [Line Items]
Gain (Loss) on Extinguishment of Debt	260,800,000
Four Point Seven Zero Percent Senior Notes Member
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	$ 722,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.70%		4.70%
Debt Instrument, Repurchase Amount	$ 525,100,000
Long-term Debt, Maturities, Repayments of Principal in Year Five	778,000,000
Eight Point Five Zero Percent Senior Notes Member
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	$ 45,700,000
Debt Instrument, Interest Rate, Stated Percentage	8.50%		8.50%
Debt Instrument, Repurchase Amount	$ 38,300,000
Long-term Debt, Maturities, Repayments of Principal in Year Three	454,300,000
Six Point Eight Seven Five Percent Senior Notes Due Two Thousand Twenty Member
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	$ 140,100,000
Debt Instrument, Interest Rate, Stated Percentage	6.875%		6.875%
Debt Instrument, Repurchase Amount	$ 103,700,000
Long-term Debt, Maturities, Repayments of Principal in Year Four	759,900,000
Four Point Five Percent Senior Notes Member [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal after Year Five	623,200,000
Debt Instrument, Repurchased Face Amount	$ 1,700,000
Debt Instrument, Interest Rate, Stated Percentage	4.50%		4.50%
Debt Instrument, Repurchase Amount	$ 900,000
Revolving Credit Facility [Member] \| Five Year Credit Facility Member
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	2,750,000,000
Line of Credit Facility, Current Borrowing Capacity	$ 2,250,000,000
Maximum Percent of Debt to Total Capitalization Ratio	60.00%
Line of Credit Facility, Commitment Fee Percentage	0.225%
Line of Credit Facility, Fair Value of Amount Outstanding	$ 0		$ 0
Revolving Credit Facility [Member] \| Base Rate [Member] \| Five Year Credit Facility Member
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Revolving Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Five Year Credit Facility Member
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.50%