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No definition available.

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

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

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

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Weighted average interest rate of debt outstanding.

+ References

No definition available.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

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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.

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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.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt, after unamortized discount or premium, scheduled 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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Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Weighted average interest rate of short-term debt outstanding.

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Notes Payable and Long-Term Debt (Details) (USD $)	3 Months Ended
Notes Payable and Long-Term Debt (Details) (USD $)	Mar. 31, 2015	Mar. 16, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Short-term Debt, Weighted Average Interest Rate	1.60%		0.80%
Long-term debt
Long-term Debt	$ 1,749,400,000us-gaap_LongTermDebt		$ 738,800,000us-gaap_LongTermDebt
Current portion of long-term debt	18,800,000us-gaap_LongTermDebtCurrent		22,500,000us-gaap_LongTermDebtCurrent
Long-term debt, net of current portion	1,730,600,000us-gaap_LongTermDebtNoncurrent		716,300,000us-gaap_LongTermDebtNoncurrent
Debt weighted average interest rate	4.60%us-gaap_DebtWeightedAverageInterestRate		2.90%us-gaap_DebtWeightedAverageInterestRate
Maximum borrowing capacity	1,250,000,000
Estimated fair value of senior unsecured notes	1,796,600,000us-gaap_DebtInstrumentFairValue		750,300,000us-gaap_DebtInstrumentFairValue
Fair value higher than carrying value for senior unsecured notes	147,500,000		98,700,000
Letters of Credit Outstanding, Amount	27,100,000		28,300,000
Short Term Borrowings [Member]
Short-term debt
Short-term borrowings	89,000,000		601,200,000
5.75% Senior Notes [Member]
Long-term debt
Long-term Debt	149,800,000		149,800,000
Debt instrument par value	150,000,000
Debt instrument stated interest rate	5.75%
Debt instrument maturity date	Nov. 01, 2016
8.00% Senior Notes [Member]
Long-term debt
Long-term Debt	134,000,000		134,000,000
Debt instrument par value	134,000,000
Debt instrument stated interest rate	8.00%
Debt instrument maturity date	Oct. 01, 2019
4.625% Senior Notes [Member]
Long-term debt
Long-term Debt	248,500,000		248,400,000
Debt instrument par value	250,000,000
Debt instrument stated interest rate	4.625%
Debt instrument maturity date	Sep. 15, 2020
3.375% Senior Notes [Member]
Long-term debt
Long-term Debt	499,000,000		0
Debt instrument par value	500,000,000	500,000,000
Debt instrument stated interest rate	3.375%
Debt instrument maturity date	Mar. 15, 2025
7.125% Senior Notes [Member]
Long-term debt
Long-term Debt	119,500,000		119,400,000
Debt instrument par value	121,000,000
Debt instrument stated interest rate	7.125%
Debt instrument maturity date	Feb. 15, 2029
4.375% Senior Notes [Member]
Long-term debt
Long-term Debt	498,400,000		0
Debt instrument par value	500,000,000	500,000,000
Debt instrument stated interest rate	4.375%
Debt instrument maturity date	Mar. 15, 2045
Revolving Credit Facility [Member]
Long-term debt
Long-term Debt	0
Current borrowing capacity	1,000,000,000
Term Loan Facilities And Other [Member]
Long-term debt
Long-term Debt	89,100,000		75,100,000
Unamortized portion of debt derivative [Member]
Long-term debt
Long-term Debt	11,100,000		12,100,000
Commercial Paper [Member]
Short-term debt
Short-term borrowings			460,900,000
Long-term debt
Current borrowing capacity	$ 1,000,000,000.0