Debt and Credit Agreements (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

A summary of the carrying amounts and fair values of our long-term debt is listed below.

	Effective Interest Rate		December 31,
			2014				2013
			Book Value		Fair Value 1		Book Value		Fair Value
6.25% Senior Unsecured Notes due 2014	6.29	%	$	0.0	$	0.0	$	351.3	$	365.6
2.25% Senior Notes due 2017 (less unamortized discount of $0.4)	2.30	%	299.6		301.2		299.4		293.0
4.00% Senior Notes due 2022 (less unamortized discount of $2.3)	4.13	%	247.7		255.2		247.4		241.6
3.75% Senior Notes due 2023 (less unamortized discount of $1.2)	4.32	%	498.8		499.8		498.6		467.3
4.20% Senior Notes due 2024 (less unamortized discount of $0.9)	4.24	%	499.1		509.8		0.0		0.0
Other notes payable and capitalized leases			80.4		80.4		86.7		87.8
Total long-term debt			1,625.6				1,483.4
Less: current portion 2			2.1				353.6
Long-term debt, excluding current portion			$	1,623.5			$	1,129.8

1 See Note 11 for information on the fair value measurement of our long-term debt.

2 We included our 6.25% Senior Unsecured Notes due 2014 (the "6.25% Notes") in the current portion of long-debt on our December 31, 2013 Consolidated Balance Sheet because the 6.25% Notes were scheduled to mature on November 15, 2014. We redeemed the 6.25% Notes prior to their scheduled maturity during the second quarter of 2014.

Schedule of Maturities of Long-term Debt [Table Text Block]

Annual maturities are scheduled as follows based on the book value as of December 31, 2014.

2015	$	2.1
2016	2.2
2017	324.2
2018	2.0
2019	2.0
Thereafter	1,293.1
Total long-term debt	$	1,625.6

Schedule of Line of Credit Facilities [Table Text Block]

A summary of our credit facilities is presented below.

	December 31,
	2014								2013
	Total Facility		Amount Outstanding		Letters of Credit		Total Available		Total Facility		Amount Outstanding		Letters of Credit		Total Available
Committed credit agreement	$	1,000.0	$	0.0	$	16.0	$	984.0	$	1,000.0	$	0.0	$	14.3	$	985.7
Uncommitted credit agreements	$	740.3	$	107.2	$	3.9	$	629.2	$	700.2	$	179.1	$	4.2	$	516.9

Schedule of Financial Covenants in Credit Agreement [Table Text Block]

The financial covenants in the Credit Agreement require that we maintain the following financial covenants listed below as of December 31, 2014 and thereafter.

Interest coverage ratio (not less than): 1	5.00x
Leverage ratio (not greater than): 2	3.25x

1 The interest coverage ratio is defined as EBITDA, as defined in the Credit Agreement, to net interest expense.

2 The leverage ratio is defined as debt as of the last day of such fiscal quarter to EBITDA, as defined in the Credit Agreement, for the four quarters then ended.