Additional Details Related to Certain Balance Sheet Captions (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2012
Other current assets
Prepaid taxes	$ 100,300,000	$ 40,000,000
Prepaid expenses	48,300,000	48,100,000
Other	28,400,000	26,300,000
Total other current assets	177,000,000	114,400,000
Other assets
Investments in joint ventures	17,300,000	37,500,000
Deposits for real-estate leases	11,500,000	10,300,000
Other	47,900,000	37,300,000
Total other assets	147,400,000	112,100,000
Indemnification assets related to acquisitions	26,100,000	27,000,000
long term investments	44,600,000	0
Accounts payable and accrued liabilities
Salaries and benefits	69,500,000	77,100,000
Incentive compensation	73,200,000	135,900,000
Customer credits, advanced payments and advanced billings	23,200,000	21,700,000
Dividends	4,400,000	65,500,000
Professional service fees	49,300,000	32,900,000
Interest accrued on debt	36,100,000	36,300,000
Accounts payable	20,400,000	16,400,000
Income taxes	33,200,000	47,500,000
Pension and other post retirement employee benefits	7,100,000	7,000,000
Other	87,800,000	71,000,000
Total accounts payable and accrued liabilities	430,800,000	538,900,000
Self-insurance reserves	26,600,000	27,600,000	55,800,000
Other liabilities
Pension and other post retirement employee benefits	161,700,000	164,000,000
Deferred rent-non-current portion	108,500,000	106,300,000
Interest accrued on UTPs	16,200,000	18,000,000
Legacy and other tax matters	15,600,000	15,400,000
Other	52,700,000	56,500,000
Total other liabilities	$ 354,700,000	$ 360,200,000