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Revenues and Segment Information, Contract Balances (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Contract liabilities, included in accrued expenses | $ 67 |  | $ 55
Contract Balances (Textual) |  |  |
Revenue recognized that was included in contract liabilities as of prior year end | 44 | $ 53 |
Receivables from Contracts with Customers [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Receivables from contracts with customers, included in receivables, net | $ 5,597 |  | $ 3,642

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