Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 51	$ 48	$ 47
Number of shares authorized	44,095,000
Tax benefit related to the stock compensation expense	$ 13	$ 13	$ 15
Weighted-average grant date fair value of the options granted	$ 7.78	$ 8.13	$ 7.13
Aggregate fair value of options vested	$ 12	$ 21	$ 21
Intrinsic value of options exercised	77	$ 94	$ 94
Cash proceeds from exercise of options	$ 103
2016 Employee Share Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized	2,000,000
Shares issued under the ESPP	0
Time-based stock options \| Stock Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted	1,643,144	1,609,170
Vesting period	4 years	4 years	4 years
Vesting rate	25.00%	25.00%	25.00%
Stock option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unearned stock-based compensation related to stock options	$ 17
Unearned stock-based compensation, expected period to recognize	4 years
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted	512,676	851,088	526,857
Unearned stock-based compensation, expected period to recognize	3 years 3 months 18 days
Unearned stock-based compensation of RSUs	$ 36
Weighted-Average Exercise Price, Granted	$ 53.94	$ 47.29	$ 42.74
Restricted Stock Units (RSUs) \| Stock Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting rate	25.00%	25.00%	25.00%
Restricted Stock Units (RSUs) \| Bonus
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting rate	50.00%
Unearned stock-based compensation related to stock options	$ 1
Restricted stock units granted	66,581	96,282	117,520
Weighted-average grant date fair value of the options granted	$ 47.85	$ 45.28	$ 45.13
Restricted Stock Units (RSUs) \| Bonus \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unearned stock-based compensation, expected period to recognize	2 years
Restricted Stock Units (RSUs) \| Bonus \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unearned stock-based compensation, expected period to recognize	3 years
Performance restricted stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		3 years
Number of Options, Granted	331,830	381,576	333,700
Weighted-Average Exercise Price, Granted	$ 50.89	$ 45.37	$ 50.50
Share based compensation arrangement required service period, years	3 years	3 years	3 years
Relative shareholder return, percentage	40.00%
Free cash flow achievement, percentage	60.00%
Maximum payout, percentage	200.00%
Unearned stock-based compensation		$ 16

Maximum payout rate.

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Percentage of free cash flow achievement to determine target award.

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Unearned stock-based compensation.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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Unrecognized cost of unvested options awarded to employees as compensation.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Net number of share options (or share units) granted during the period.

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Percentage of vesting of share-based compensation awards.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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