Indebtedness (Aggregate Maturities of Long-Term Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
2020	$ 4,051	$ 4,054
2021	3,015
2022	2,764
2023	1,607
2024	3,283
2025-2029	6,332
2030-2034	1,400
Thereafter	8,510
Long-term debt, gross	30,962
Debt discounts	(255)
Total long-term debt	$ 30,707	$ 31,029

Long Term Debt Maturities Repayments Of Principal After Five Through Ten Years

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Long Term Debt Maturities Repayments Of Principal After Ten Through Fifteen Years

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Long Term Debt Maturities Repayments Of Principal Thereafter

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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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Amount, after accumulated amortization, of debt discount.

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

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

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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