SUPPLEMENTARY INFORMATION - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2020	Sep. 16, 2020	Jan. 17, 2020	Dec. 31, 2019
Supplementary Information
Restricted cash and cash equivalents	$ 26			$ 37
Accrued and other current liabilities	1,364			1,342
Employee-related Liabilities	$ 431			479
Debt Instrument, Redemption Price, Percentage	101.00%
Restricted cash	$ 6,206			0
Special Cash Payment	7,300
N&B Bridge Loan [Member]
Supplementary Information
N&B Notes Offering	$ 6,250	$ 0	$ 6,250	$ 7,500

one-time cash payment related to proposed N&B transaction

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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Amount of cash restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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