Debt (Long-Term Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Debt
Future finance lease payments, net	$ 1,196	$ 711
Total debt	15,196	4,711
Unamortized discount and debt issuance costs	(173)	(42)
Less: Current portion of Notes	(999)	0
Less: Current portion of future finance lease payments, net	(122)	(115)
Long-term debt	13,902	4,554
2011-2016 Notes Issuances
Debt
Notes issuances	$ 4,000	4,000
2011-2016 Notes Issuances \| Minimum
Debt
Coupon Rate	2.00%
Effective Interest Rate	2.23%
2011-2016 Notes Issuances \| Maximum
Debt
Coupon Rate	3.63%
Effective Interest Rate	3.73%
2020 Notes Issuance
Debt
Notes issuances	$ 10,000	$ 0
2020 Notes Issuance \| Minimum
Debt
Coupon Rate	0.45%
Effective Interest Rate	0.57%
2020 Notes Issuance \| Maximum
Debt
Coupon Rate	2.25%
Effective Interest Rate	2.33%

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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

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Amount of unamortized debt discount (premium) and debt issuance costs.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Present value of lessee's discounted obligation for lease payments from finance lease, classified as current.

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Amount of long-term debt and lease obligation, classified as noncurrent.

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Amount of long-term debt and lease obligation, including portion classified as current.

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

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