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Share-Based Compensation And Other Compensation Arrangements (Narrative) (Details) - USD ($)							12 Months Ended
	Feb. 17, 2021	Dec. 14, 2020	Feb. 28, 2020	Feb. 24, 2020	Feb. 25, 2019	Feb. 26, 2018	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
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							1,709,379	1,860,520
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value							$ 84,000,000	$ 90,000,000	$ 279,000,000
Share-based Payment Arrangement, Exercise of Option, Tax Benefit							19,000,000	32,000,000	61,000,000
Restricted stock units (RSUs) granted (fair value per share)		$ 233.00
Deferred compensation							126,000,000	93,000,000	174,000,000
Deferred compensation liability which is being marked to market							$ 1,703,000,000	1,718,000,000
Granted							491,308
Incentive Program Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost							$ 258,000,000
Granted							1,027,507
Employee Incentive Program Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost							$ 573,000,000
2021 Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost							19,000,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted				325,108		233,582
Restricted stock units (RSUs) granted (fair value per share)		$ 215.70		$ 319.04		$ 428.22
Restricted Stock Units (RSUs) [Member] \| Incentive Program Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	980,077
Restricted Stock Units (RSUs) [Member] \| Employee Incentive Program Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted		5,163,425
Performance Awards [Member] \| 2020 Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)			3 years
Initial Value Of Performance Awards (per unit)			$ 100
Performance Awards [Member] \| 2019 performance awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)					3 years
Initial Value Of Performance Awards (per unit)					$ 100
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] \| 2020 Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount payable at end of three-year performance period3			0
Performance Awards [Member] \| Minimum [Member] \| 2019 performance awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount payable at end of three-year performance period3					0
Performance Awards [Member] \| Maximum [Member] \| 2020 Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount payable at end of three-year performance period3			$ 150
Performance Awards [Member] \| Maximum [Member] \| 2019 performance awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount payable at end of three-year performance period3					$ 200
Performance Award Payout Amount, Aggregate								$ 253,000,000
Performance Awards [Member] \| Maximum [Member] \| 2018PerformanceAwardMember [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Award Payout Amount, Aggregate									$ 323,000,000
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
Restricted stock units (RSUs) granted (fair value per share)				$ 357.38	$ 466.04
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate				27.04%	23.88%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate				1.21%	2.46%
Performance Based Restricted Stock Units (PBRSUs) [Member] \| 2020 PBRSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted				290,202
Performance Based Restricted Stock Units (PBRSUs) [Member] \| 2019 PBRSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted					214,651
Performance Based Restricted Stock Units (PBRSUs) [Member] \| Minimum [Member] \| 2020 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] \| 2019 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] \| 2020 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] \| 2019 PBRSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Payout Range					200.00%
Stock Options [Member] \| 2021 Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	37.80%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	1.30%
Granted	342,986						148,322
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 74.63
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	6 years 7 months 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent							120.00%
Stock Options [Member] \| 2021 Stock Options Non-Premium [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted							108,000
Stock Options [Member] \| 2021 Stock Options Premium [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted							40,322