Components of Deferred Tax Assets and Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Deferred tax assets:
Total deferred tax assets	$ 332.0	$ 367.3
Deferred tax liabilities:
Net deferred tax asset	147.9	164.1
Valuation allowance	(8.4)	(15.2)	13.9	12.8
Total net deferred tax assets	139.5	148.9
Current
Deferred tax assets:
Account receivable allowances	8.2	8.2
Accrued compensation and benefits	12.8	13.3
Deferred revenue	7.3	6.1
Legal and professional fees	10.9	8.4
Restructuring	3.5	1.5
Uncertain tax positions	7.5	0
Other	0.7	3.1
Total current	50.9	40.6
Deferred tax liabilities:
Other liabilities	0	(0.2)
Total Current	0	(0.2)
Non-Current
Deferred tax assets:
Deferred revenue	33.4	34.3
Uncertain tax positions	26.8	25.9
Other	4.3	4.5
Accumulated depreciation and amortization	2.6	0.4
Stock-based compensation	73.7	86.9
Benefit plans	78.9	96.6
Deferred rent and construction allowance	30.4	31.3
Foreign net operating loss	10.6	13.0
Self-insured related reserves	20.4	33.8
Total non-current	281.1	326.7
Deferred tax liabilities:
Other liabilities	(2.7)	(3.9)
Accumulated depreciation and amortization of intangible assets and capitalized software	(153.7)	(154.7)
Foreign earnings to be repatriated	(3.7)	(4.7)
Self-insured related income	(24.0)	(39.7)
Total non-current	(184.1)	(203.0)
Total deferred tax liabilities	$ (184.1)	$ (203.2)