Accounting for Uncertainty in Income Taxes - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2015	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Liability for unrecognized tax benefits that would affect effective tax rate, if recognized	$ 89.0	$ 90.4
Number of tax years the company is currently open to audit by tax authorities	9 years

The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

Name:	us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant