Debt (Schedule Of Outstanding Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Current portion of long-term debt	$ 17	$ 517
Short-term debt	17	517
Long-term debt	10,950	11,313
Long-term debt, net	10,933	10,796
Senior notes – 4.80% due 2021
Debt Instrument [Line Items]
Long-term debt	$ 0	500
Interest rate	4.80%
Senior notes – 2.75% due 2022
Debt Instrument [Line Items]
Long-term debt	$ 0	499
Interest rate	2.75%
Senior notes – 3.30% due 2023
Debt Instrument [Line Items]
Long-term debt	$ 349	349
Interest rate	3.30%
Senior notes – 4.05% due 2023
Debt Instrument [Line Items]
Long-term debt	$ 249	249
Interest rate	4.05%
Senior notes – 3.50% due 2024
Debt Instrument [Line Items]
Long-term debt	$ 599	598
Interest rate	3.50%
Senior notes – 3.875% due 2024
Debt Instrument [Line Items]
Long-term debt	$ 997	995
Interest rate	3.875%
Senior notes – 3.50% due 2025
Debt Instrument [Line Items]
Long-term debt	$ 498	498
Interest rate	3.50%
Senior notes – 1.349% due 2026
Debt Instrument [Line Items]
Long-term debt	$ 629	677
Interest rate	1.349%
Senior notes – 3.75% due 2026
Debt Instrument [Line Items]
Long-term debt	$ 598	597
Interest rate	3.75%
Senior notes – 4.375% due 2029
Debt Instrument [Line Items]
Long-term debt	$ 1,499	1,499
Interest rate	4.375%
Senior notes – 1.979% due 2030
Debt Instrument [Line Items]
Long-term debt	$ 614	664
Interest rate	1.979%
Senior notes – 2.25% due 2030
Debt Instrument [Line Items]
Long-term debt	$ 739	737
Interest rate	2.25%
Senior notes – 2.375% due 2031
Debt Instrument [Line Items]
Long-term debt	$ 397	0
Interest rate	2.375%
Senior notes – 5.875% due 2033
Debt Instrument [Line Items]
Long-term debt	$ 298	298
Interest rate	5.875%
Senior notes – 4.75% due 2039
Debt Instrument [Line Items]
Long-term debt	$ 495	495
Interest rate	4.75%
Senior notes – 4.35% due 2047
Debt Instrument [Line Items]
Long-term debt	$ 493	493
Interest rate	4.35%
Senior notes – 4.20% due 2048
Debt Instrument [Line Items]
Long-term debt	$ 593	592
Interest rate	4.20%
Senior notes – 4.90% due 2049
Debt Instrument [Line Items]
Long-term debt	$ 1,238	1,237
Interest rate	4.90%
Senior notes – 2.90% due 2051
Debt Instrument [Line Items]
Long-term debt	$ 346	0
Interest rate	2.90%
Mortgage – 5.70% due 2035
Debt Instrument [Line Items]
Long-term debt	$ 316	331
Interest rate	5.70%
Other
Debt Instrument [Line Items]
Long-term debt	$ 3	$ 5

Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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