Other Balance Sheet and Statement of Operations Information - Additional Details Related to Certain Balance Sheet Captions (Detail) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Other current assets:
Prepaid taxes	$ 147,700,000	$ 100,100,000
Prepaid expenses	86,200,000	102,000,000.0
Capitalized costs to obtain and fulfill sales contracts	73,400,000	77,200,000
Other	28,500,000	3,000,000.0
Total other current assets	335,800,000	282,300,000
Other assets
Investments in joint ventures	121,400,000	104,600,000
Deposits for real-estate leases	14,600,000	13,500,000
Indemnification assets related to acquisitions	16,200,000	16,100,000
Mutual funds and fixed deposits	5,700,000	18,900,000
Costs to obtain sales contracts	89,100,000	78,000,000.0
Interest rate swaps	54,100,000	26,900,000
Other	16,400,000	16,300,000
Total other assets	317,500,000	274,300,000
Accounts payable and accrued liabilities
Salaries and benefits	101,900,000	112,500,000
Incentive compensation	95,900,000	154,500,000
Customer credits, advanced payments and advanced billings	21,300,000	20,400,000
Self-insurance reserves	11,400,000	10,600,000
Dividends	5,000,000.0	6,500,000
Professional service fees	57,900,000	47,700,000
Interest accrued on debt	66,200,000	70,500,000
Accounts payable	4,900,000	30,100,000
Income taxes	75,100,000	71,400,000
Pension and other post retirement employee benefits	6,500,000	6,400,000
Accrued royalties	13,300,000	25,100,000
Foreign exchange forwards on certain assets and liabilities	1,600,000	8,200,000
Restructuring liability	34,300,000	35,500,000
Other	93,400,000	95,800,000
Total accounts payable and accrued liabilities	588,700,000	695,200,000
Other liabilities
Pension and other post retirement employee benefits	265,900,000	249,200,000
Deferred rent-non-current portion		94,300,000
Interest accrued on UTPs	69,800,000	69,600,000
Income tax liability - non-current	125,300,000	125,300,000
Interest rate swaps	10,900,000	8,200,000
Restructuring liability	5,800,000	6,800,000
Other	13,800,000	23,100,000
Total other liabilities	$ 491,500,000	$ 576,500,000