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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 |  |  |

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