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Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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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.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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

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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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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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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.

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Weighted average interest rate of short-term debt outstanding.

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Notes Payable and Long-Term Debt (Details)	3 Months Ended
Notes Payable and Long-Term Debt (Details)	Mar. 31, 2017 USD ($)	Mar. 31, 2017 EUR (€)	Dec. 31, 2016 USD ($)	Jul. 20, 2016 USD ($)
Long-term debt
Long-term Debt	$ 2,063,700,000		$ 2,063,000,000
Current portion of long-term debt	23,400,000		19,400,000
Long-term debt, net of current portion	$ 2,040,300,000		$ 2,043,600,000
Short-term Debt, Weighted Average Interest Rate	2.10%	2.10%	2.30%
Debt weighted average interest rate	3.80%	3.80%	3.80%
Maximum borrowing capacity	$ 1,250,000,000
Estimated fair value of senior unsecured notes	2,104,800,000		$ 2,081,400,000
Fair value higher than carrying value for senior unsecured notes	78,700,000		62,000,000
Letters of Credit Outstanding, Amount	23,700,000		32,300,000
Short Term Borrowings [Member]
Short-term debt
Short-term borrowings	231,700,000		156,500,000
8.00% Senior Notes [Member]
Long-term debt
Long-term Debt	138,700,000		139,100,000
Debt instrument par value	$ 134,000,000
Debt instrument stated interest rate	8.00%	8.00%
Debt instrument maturity date	Oct. 01, 2019
4.625% Senior Notes [Member]
Long-term debt
Long-term Debt	$ 251,800,000		251,900,000
Debt instrument par value	$ 250,000,000
Debt instrument stated interest rate	4.625%	4.625%
Debt instrument maturity date	Sep. 15, 2020
1.80% Senior Notes [Member]
Long-term debt
Long-term Debt	$ 527,700,000		520,700,000
Debt instrument par value \| €		€ 500,000,000
Debt instrument stated interest rate	1.80%	1.80%
Debt instrument maturity date	Nov. 07, 2022
3.375% Senior Notes [Member]
Long-term debt
Long-term Debt	$ 495,700,000		495,600,000
Debt instrument par value	$ 500,000,000
Debt instrument stated interest rate	3.375%	3.375%
Debt instrument maturity date	Mar. 15, 2025
7.125% Senior Notes [Member]
Long-term debt
Long-term Debt	$ 118,800,000		118,800,000
Debt instrument par value	$ 121,000,000
Debt instrument stated interest rate	7.125%	7.125%
Debt instrument maturity date	Feb. 15, 2029
4.375% Senior Notes [Member]
Long-term debt
Long-term Debt	$ 493,400,000		493,300,000
Debt instrument par value	$ 500,000,000
Debt instrument stated interest rate	4.375%	4.375%
Debt instrument maturity date	Mar. 15, 2045
Revolving Credit Facility [Member]
Long-term debt
Current borrowing capacity	$ 1,000,000,000
Term Loan Facilities And Other [Member]
Long-term debt
Long-term Debt	37,600,000		43,600,000
Interest rate swaps
Long-term debt
Derivative, Notional Amount				$ 384,000,000
Unamortized portion of interest rate swap \| 8.00% Senior Notes [Member]
Long-term debt
Long-term Debt	3,800,000		4,100,000
Derivative assets	1,200,000		1,300,000
Unamortized portion of interest rate swap \| 4.625% Senior Notes [Member]
Long-term debt
Derivative assets	3,700,000		3,900,000
Commercial Paper [Member]
Short-term debt
Short-term borrowings	160,000,000		$ 50,800,000
Long-term debt
Current borrowing capacity	$ 1,000,000,000.0