Description of Business, Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jan. 01, 2016
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Depreciation		$ 49	$ 53	$ 51
Antidilutive options to purchase were excluded from computation of diluted earnings per share (in shares)			141,900,000
Debt issuance cost	$ 2	2	$ 3
Effective income tax rate reconciliation, excess tax expense	$ 5	5
Net cash provided by operating activities		$ 446	$ 401	$ 680
Decrease in weighted average dilutes shares (in shares)		(131,500,000)	(139,600,000)	(157,800,000)
Internal-Use Software
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Period capitalized on a straight-line basis when the asset is substantially ready for use		3 years
Capitalized Software
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets amortizable period		4 years
Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Fees payment term (in days)		30 days
Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Fees payment term (in days)		90 days
Equipment | Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated Useful Lives		3 years
Equipment | Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated Useful Lives		20 years
Building | Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated Useful Lives		25 years
Building | Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated Useful Lives		45 years
Employee Stock Option
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Antidilutive options to purchase were excluded from computation of diluted earnings per share (in shares)		5,200,000	4,500,000	2,400,000
Accounting Standards Update 2016-09, Excess Tax Benefit | New Accounting Pronouncement, Early Adoption, Effect
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Net cash provided by operating activities		$ 3
Decrease in weighted average dilutes shares (in shares)		131,000
Accounting Standards Update 2016-09, Excess Tax Benefit | Retained Earnings | New Accounting Pronouncement, Early Adoption, Effect
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Cumulative effect of new accounting principle					$ 1
Subscription License | Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Contract terms (in years)		1 year
Subscription License | Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Contract terms (in years)		5 years
Software and Cloud Services | Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Contract terms (in years)		1 year
Software and Cloud Services | Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Contract terms (in years)		5 years
Rentals | Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Contract terms (in years)		1 year
Rentals | Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Contract terms (in years)		3 years
Utility Model | Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Contract terms (in years)		1 year
Utility Model | Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Contract terms (in years)		5 years