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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Fair value portion of notes payable.

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Fair Value Instruments - Carrying and Estimated Fair Value of Debt (Details) - USD ($) $ in Millions	Jun. 30, 2022	May 01, 2020
Unsecured Debt \| 2.75% Notes due November 2022
Debt Instrument [Line Items]
Stated interest rate	2.75%
Carrying value	$ 300
Unsecured Debt \| 4.75% Notes due 2023
Debt Instrument [Line Items]
Stated interest rate	4.75%
Carrying value	$ 1,247
Unsecured Debt \| 5.25% Notes due 2025
Debt Instrument [Line Items]
Stated interest rate	5.25%
Carrying value	$ 1,549
Unsecured Debt \| 3.00% Notes due 2026
Debt Instrument [Line Items]
Stated interest rate	3.00%
Carrying value	$ 300
Unsecured Debt \| 3.45% Notes due 2027
Debt Instrument [Line Items]
Stated interest rate	3.45%
Carrying value	$ 300
Unsecured Debt \| 5.125% Notes due 2027
Debt Instrument [Line Items]
Stated interest rate	5.125%
Carrying value	$ 1,944
Unsecured Debt \| 7.375% Debentures due 2027
Debt Instrument [Line Items]
Stated interest rate	7.375%
Carrying value	$ 115
Unsecured Debt \| 2.625% Notes due 2030
Debt Instrument [Line Items]
Stated interest rate	2.625%
Carrying value	$ 500
Unsecured Debt \| 1.000% PSP1 due 2030
Debt Instrument [Line Items]
Stated interest rate	1.00%
Carrying value	$ 976
Unsecured Debt \| 1.000% PSP2 due 2031
Debt Instrument [Line Items]
Stated interest rate	1.00%
Carrying value	$ 566
Unsecured Debt \| 1.000% PSP3 due 2031
Debt Instrument [Line Items]
Stated interest rate	1.00%
Carrying value	$ 526
Enhanced Equipment Trust Certificate \| Pass Through Certificates due August 2022 - 6.19%
Debt Instrument [Line Items]
Stated interest rate	6.19%
Carrying value	$ 33
Convertible Debt
Debt Instrument [Line Items]
Stated interest rate		1.25%
Convertible Debt \| 1.25% Convertible Notes due 2025
Debt Instrument [Line Items]
Stated interest rate	1.25%
Carrying value	$ 1,795
Level 2 \| Unsecured Debt \| 2.75% Notes due November 2022
Debt Instrument [Line Items]
Notes payable, Estimated Fair Value	300
Level 2 \| Unsecured Debt \| 4.75% Notes due 2023
Debt Instrument [Line Items]
Notes payable, Estimated Fair Value	1,259
Level 2 \| Unsecured Debt \| 5.25% Notes due 2025
Debt Instrument [Line Items]
Notes payable, Estimated Fair Value	1,582
Level 2 \| Unsecured Debt \| 3.00% Notes due 2026
Debt Instrument [Line Items]
Notes payable, Estimated Fair Value	281
Level 2 \| Unsecured Debt \| 3.45% Notes due 2027
Debt Instrument [Line Items]
Notes payable, Estimated Fair Value	282
Level 2 \| Unsecured Debt \| 5.125% Notes due 2027
Debt Instrument [Line Items]
Notes payable, Estimated Fair Value	1,963
Level 2 \| Unsecured Debt \| 7.375% Debentures due 2027
Debt Instrument [Line Items]
Loans payable, Estimated Fair Value	126
Level 2 \| Unsecured Debt \| 2.625% Notes due 2030
Debt Instrument [Line Items]
Notes payable, Estimated Fair Value	423
Level 2 \| Enhanced Equipment Trust Certificate \| Pass Through Certificates due August 2022 - 6.19%
Debt Instrument [Line Items]
Notes payable, Estimated Fair Value	33
Level 2 \| Convertible Debt \| 1.25% Convertible Notes due 2025
Debt Instrument [Line Items]
Notes payable, Estimated Fair Value	2,121
Level 3 \| Unsecured Debt \| 1.000% PSP1 due 2030
Debt Instrument [Line Items]
Notes payable, Estimated Fair Value	900
Level 3 \| Unsecured Debt \| 1.000% PSP2 due 2031
Debt Instrument [Line Items]
Notes payable, Estimated Fair Value	510
Level 3 \| Unsecured Debt \| 1.000% PSP3 due 2031
Debt Instrument [Line Items]
Notes payable, Estimated Fair Value	$ 470