Revenue Recognition - Contract with Customer, Asset and Liability (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Capitalized Contract Cost [Line Items]
Customer receivables	$ 1,365	$ 1,493
Contract assets	70	73
Contract liabilities	671	680
Accounts receivable, gross	1,500	1,600
Allowance for doubtful accounts receivable	99	102
Disposal Group, Held-for-sale, Not Discontinued Operations
Capitalized Contract Cost [Line Items]
Customer receivables	260	288
Contract assets	9	9
Contract liabilities	$ 154	$ 161

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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