Financial Information for Subsidiary and Guarantor Parent (Changes) (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Current assets	$ 2,383.5		$ 2,482.1
Assets	6,469.3		6,582.6
Current liabilities	888.0		959.9
Liabilities	3,756.5		3,861.2
Stockholders' equity	2,700.7	$ 2,978.6	2,709.3	$ 2,994.7
Cash flows provided by (used in) operating activities	91.5	(37.5)
Net Cash Provided by (Used in) Investing Activities	(63.8)	(188.3)
Cash used in financing activities	(46.3)	(445.9)
NonGuarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Current assets	4,305.4		4,183.1
Assets	6,858.8		6,758.0
Current liabilities	449.7		471.1
Liabilities	817.6		855.9
Stockholders' equity	6,029.1		5,890.0
Cash flows provided by (used in) operating activities	227.6	205.0
Net Cash Provided by (Used in) Investing Activities	(244.4)	(883.9)
Cash used in financing activities	(5.9)	(5.7)
Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Current assets	581.3		623.8
Assets	2,326.0		2,361.2
Current liabilities	1,564.9		1,532.3
Liabilities	2,088.9		2,064.1
Stockholders' equity	237.1		297.1
Cash flows provided by (used in) operating activities	(98.1)	(196.9)
Net Cash Provided by (Used in) Investing Activities	(25.8)	(70.9)
Cash used in financing activities	125.0	279.7
Parent Company
Condensed Financial Statements, Captions [Line Items]
Current assets	12.3		66.0
Assets	6,266.2		6,241.3
Current liabilities	1,388.9		1,347.3
Liabilities	3,565.5		3,532.0
Stockholders' equity	2,700.7		2,709.3
Cash flows provided by (used in) operating activities	(38.0)	(45.6)
Net Cash Provided by (Used in) Investing Activities	0.0	0.0
Cash used in financing activities	41.0	46.6
Consolidation Eliminations
Condensed Financial Statements, Captions [Line Items]
Current assets	(2,515.5)		(2,390.8)
Assets	(8,981.7)		(8,777.9)
Current liabilities	(2,515.5)		(2,390.8)
Liabilities	(2,715.5)		(2,590.8)
Stockholders' equity	(6,266.2)		$ (6,187.1)
Cash flows provided by (used in) operating activities	0.0	0.0
Net Cash Provided by (Used in) Investing Activities	206.4	766.5
Cash used in financing activities	$ (206.4)	$ (766.5)

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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