Goodwill - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Dec. 31, 2013		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Goodwill [Line Items]
Goodwill impairment charge	$ 63,555		$ 63,555
Remaining goodwill	4,679,648		4,679,648		3,826,749		3,900,752
EMEA
Goodwill [Line Items]
Goodwill impairment charge			63,555	[1]
Remaining goodwill	546,856	[1]	546,856	[1]	593,613	[1]	581,523	[1]
EMEA | Middle East
Goodwill [Line Items]
Goodwill impairment charge	63,555
Remaining goodwill	$ 77,000		$ 77,000

[1] Gross goodwill balances for the EMEA segment were $1.1 billion as of both January 1, 2012 and December 31, 2013. The EMEA segment includes accumulated impairment losses of $488 million as of January 1, 2012, and $551 million as of December 31, 2013.