Revenue Recognition - Contract with Customer, Asset and Liability (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Capitalized Contract Cost [Line Items]
Customer receivables	$ 1,411	$ 1,493
Contract assets	64	73
Contract liabilities	673	680
Accounts receivable, gross	1,500	1,600
Allowance for doubtful accounts receivable	92	102
Disposal Group, Held-for-sale, Not Discontinued Operations
Capitalized Contract Cost [Line Items]
Customer receivables	294	288
Contract assets	9	9
Contract liabilities	$ 152	$ 161