Compensation Related Costs Disclosure [Line Items]

No definition available.

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- Definition

The maximum number of shares originally approved, net of any subsequent amendments and adjustments, for employee purchases under the employee stock purchase plan.

+ References

No definition available.

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- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

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- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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.

+ References

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

+ References

No definition available.

+ Details

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Employee Stock and Savings Plans - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Compensation Related Costs Disclosure [Line Items]
Shares authorized for future grant	214		214
Shares reserved for future issuance through the employee stock purchase plan	142		142
Company contribution amount for each dollar a participant contributes to the savings plan	50.00%
Matching contributions for all employee savings plans			$ 549	$ 454	$ 420
First 6% of Participant Contributions
Compensation Related Costs Disclosure [Line Items]
Company contribution amount for each dollar a participant contributes to the savings plan		50.00%		50.00%	50.00%
Upper Limit
Compensation Related Costs Disclosure [Line Items]
Percentage of employee's earnings the company may contribute to the savings plan		3.00%		3.00%	3.00%
Upper Limit \| IRS Compensation Limit
Compensation Related Costs Disclosure [Line Items]
Percentage of employee's earnings the company may contribute to the savings plan	50.00%	3.00%		3.00%	3.00%
Stock Awards
Compensation Related Costs Disclosure [Line Items]
Unrecognized compensation costs	$ 4,800		$ 4,800
Unrecognized compensation costs are expected to be recognized over a weighted average period (years)			3 years
Weighted average grant-date fair value			$ 41.51	$ 42.36	$ 31.50
Fair value of awards vested			$ 3,900	$ 4,200	$ 3,200
Stock Awards \| Lower Limit
Compensation Related Costs Disclosure [Line Items]
Award vest period			4 years
Stock Awards \| Upper Limit
Compensation Related Costs Disclosure [Line Items]
Award vest period			5 years
Employee Stock
Compensation Related Costs Disclosure [Line Items]
Percentage of market value at which employees are able to purchase shares of common stock			90.00%	90.00%	90.00%
Maximum percentage of gross compensation at which employees may purchase shares	15.00%		15.00%	15.00%	15.00%
Executive Incentive Plan
Compensation Related Costs Disclosure [Line Items]
Award vest period			4 years