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The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

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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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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.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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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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Number of options outstanding, including both vested and non-vested options.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Share-Based Compensation And Other Compensation Arrangements (Narrative) (Details) - USD ($)				1 Months Ended			12 Months Ended
	Feb. 22, 2016	Feb. 23, 2015	Feb. 24, 2014	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Feb. 28, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of shares of stock available for issuance							87,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period							8,646,612	12,925,944
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value							$ 265,000,000	$ 385,000,000	$ 250,000,000
Cash received from options exercised							321,000,000	399,000,000	343,000,000
Tax benefit realized from exercise of stock options							94,000,000	135,000,000	87,000,000
Grant date fair value of stock options vested							27,000,000	56,000,000	87,000,000
Deferred compensation							46,000,000	63,000,000	44,000,000
Deferred compensation liability which is being marked to market							$ 1,126,000,000	1,191,000,000
2014 Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period							6,221
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award options expiration term (in years)							10 years
Award vesting period (in years)							3 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units (RSUs) granted				777,837	590,778	695,651
Restricted stock units (RSUs) granted (fair value per share)				$ 117.50	$ 154.64	$ 129.58
Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)				3 years
Performance Awards [Member] \| 2016 Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Initial Value Of Performance Awards (per unit)				$ 100
Performance Awards [Member] \| 2015 Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)					3 years
Performance Awards [Member] \| 2014 Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)						3 years
Performance Awards [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Award Payout Amount, Aggregate							$ 0
Performance Awards [Member] \| Minimum [Member] \| 2016 Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount payable at end of three-year performance period2				0
Performance Awards [Member] \| Minimum [Member] \| 2015 Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount payable at end of three-year performance period2					$ 0
Performance Awards [Member] \| Minimum [Member] \| 2014 Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount payable at end of three-year performance period2						$ 0
Performance Awards [Member] \| Maximum [Member] \| 2016 Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Award Payout Amount, Aggregate							$ 338,000,000
Amount payable at end of three-year performance period2				$ 200
Performance Awards [Member] \| Maximum [Member] \| 2015 Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Award Payout Amount, Aggregate								$ 322,000,000
Amount payable at end of three-year performance period2					$ 200
Performance Awards [Member] \| Maximum [Member] \| 2014 Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Award Payout Amount, Aggregate									$ 315,000,000
Amount payable at end of three-year performance period2						$ 200
Performance Based Restricted Stock Units (PBRSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years	3 years	3 years
Restricted stock units (RSUs) granted				721,176	556,203	662,215
Restricted stock units (RSUs) granted (fair value per share)	$ 126.74	$ 164.26	$ 136.12
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	22.44%	20.35%	24.20%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	0.92%	1.03%	0.72%
Performance Based Restricted Stock Units (PBRSUs) [Member] \| 2016 PBRSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Initial PBRSU value, percentage of value it cannot exceed										400.00%
Performance Based Restricted Stock Units (PBRSUs) [Member] \| 2015 PBRSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Initial PBRSU value, percentage of value it cannot exceed		400.00%
Performance Based Restricted Stock Units (PBRSUs) [Member] \| 2014 PBRSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Initial PBRSU value, percentage of value it cannot exceed		400.00%
Performance Based Restricted Stock Units (PBRSUs) [Member] \| Minimum [Member] \| 2016 PBRSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Payout Range										0.00%
Performance Based Restricted Stock Units (PBRSUs) [Member] \| Minimum [Member] \| 2015 PBRSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Payout Range		0.00%
Performance Based Restricted Stock Units (PBRSUs) [Member] \| Minimum [Member] \| 2014 PBRSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Payout Range		0.00%
Performance Based Restricted Stock Units (PBRSUs) [Member] \| Maximum [Member] \| 2016 PBRSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Payout Range										200.00%
Performance Based Restricted Stock Units (PBRSUs) [Member] \| Maximum [Member] \| 2015 PBRSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Payout Range		200.00%
Performance Based Restricted Stock Units (PBRSUs) [Member] \| Maximum [Member] \| 2014 PBRSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Payout Range		200.00%