Debt and Credit Facilities - Lines of Credit (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
Used lines of credit	$ 332.2	$ 241.9	[1]
Unused lines of credit	985.5	1,039.9
Total available lines of credit	$ 1,317.7	$ 1,281.8

[1] As of January 1, 2016, we have adopted ASU 2015-03 and ASU 2015-15 with retrospective application. This resulted in a reclassification from other non-current assets to long-term debt, less current portion for debt issuance costs as of December 31, 2015. Refer to Note 2, “Recently Issued Accounting Standards” of the notes to the condensed consolidated financial statements for further details.