Financial Information for Subsidiary and Guarantor Parent (Changes) (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Current assets	$ 2,098.6		$ 2,482.1
Assets	6,161.1		6,582.6
Current liabilities	737.1		959.9
Liabilities	3,643.5		3,861.2
Stockholders' equity	2,505.5	$ 2,979.6	2,709.3	$ 2,994.7
Cash flows provided by (used in) operating activities	108.9	(38.2)
Net Cash Provided by (Used in) Investing Activities	(100.0)	(248.1)
Cash used in financing activities	(80.9)	(476.3)
NonGuarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Current assets	4,207.9		4,183.1
Assets	6,727.8		6,758.0
Current liabilities	414.2		471.1
Liabilities	678.6		855.9
Stockholders' equity	6,037.1		5,890.0
Cash flows provided by (used in) operating activities	341.3	285.0
Net Cash Provided by (Used in) Investing Activities	(388.4)	(1,037.8)
Cash used in financing activities	(21.2)	(16.8)
Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Current assets	440.8		623.8
Assets	2,196.1		2,361.2
Current liabilities	1,419.9		1,532.3
Liabilities	2,044.8		2,064.1
Stockholders' equity	151.3		297.1
Cash flows provided by (used in) operating activities	(171.1)	(263.2)
Net Cash Provided by (Used in) Investing Activities	(44.8)	(115.6)
Cash used in financing activities	209.0	383.4
Parent Company
Condensed Financial Statements, Captions [Line Items]
Current assets	10.9		66.0
Assets	6,186.6		6,241.3
Current liabilities	1,464.0		1,347.3
Liabilities	3,681.1		3,532.0
Stockholders' equity	2,505.5		2,709.3
Cash flows provided by (used in) operating activities	(61.3)	(60.0)
Net Cash Provided by (Used in) Investing Activities	(0.1)	(0.1)
Cash used in financing activities	64.6	62.5
Consolidation Eliminations
Condensed Financial Statements, Captions [Line Items]
Current assets	(2,561.0)		(2,390.8)
Assets	(8,949.4)		(8,777.9)
Current liabilities	(2,561.0)		(2,390.8)
Liabilities	(2,761.0)		(2,590.8)
Stockholders' equity	(6,188.4)		$ (6,187.1)
Cash flows provided by (used in) operating activities	0.0	0.0
Net Cash Provided by (Used in) Investing Activities	333.3	905.4
Cash used in financing activities	$ (333.3)	$ (905.4)

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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