Discontinued Operations (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended			3 Months Ended		6 Months Ended		6 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Jun. 30, 2013 DirectStar [Member]	Jun. 30, 2012 DirectStar [Member]	Jun. 30, 2013 Globetec [Member]	Sep. 30, 2012 Globetec [Member]	Jun. 30, 2013 Globetec [Member]	Dec. 31, 2012 Globetec [Member]	Jun. 30, 2013 Globetec [Member] Segment, Discontinued Operations [Member] Financing Receivable [Member]	Dec. 31, 2012 Globetec [Member] Segment, Discontinued Operations [Member] Financing Receivable [Member]	Jun. 30, 2013 Globetec [Member] Segment, Discontinued Operations [Member] Trade Accounts Receivable [Member] Asset-backed Securities, Securitized Loans and Receivables [Member] Foreign Operation [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operations description			In May 2012, Red Ventures exercised its option to acquire from the Company all of the issued and outstanding equity interests in DirectStar, which provides marketing and sales services on behalf of DIRECTV®. The Company consummated the sale of DirectStar to Red Ventures in June 2012 for a net sale price of $98.9 million in cash. DirectStar is presented as a discontinued operation in the Company’s condensed unaudited consolidated financial statements for all periods presented.				In September 2012, the Company's board of directors approved a plan of sale for its Globetec business. The decision to sell was made after evaluation of, among other things, short and long-term prospects of the Globetec operation. Accordingly, Globetec's projects and assets are reflected as assets and liabilities of discontinued operations in the condensed unaudited consolidated balance sheets for all periods presented, and Globetec's results of operations are presented as discontinued operations in the condensed unaudited consolidated statements of operations for all periods presented.
Disposal date			Jun. 30, 2012
Net sale price				$ 98.9
Net assets of discontinued operations					19.4		19.4
Assets of discontinued operations					29.3		29.3	26.3
Liabilities of discontinued operations					9.9		9.9	10.7
Goodwill and intangible asset impairment, disposal group						6.4
Estimated losses on disposal, other					0.3	6.3
Discontinued operations accounts receivable, additional disclosures									The Globetec business has trade receivables for certain “pay-when-paid” projects that provide for payment through March 2018. These receivables, which are included within assets of discontinued operations, have been recorded at their respective net present values, with the non-current portion recorded within long-term assets of discontinued operations. Imputed interest is reflected within the results of operations from discontinued operations.		Certain of Globetec's international subsidiaries obtained short-term financing by factoring their respective accounts receivable.
Financing receivable									6.0	6.3
Financing receivable, non-current portion									4.0	4.3
Depreciation and amortization, discontinued operations	$ 0.2	$ 0.5