Supplemental Financial Information - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021
Cash and Cash Equivalents [Line Items]
Cash paid for interest	$ 474	$ 506
Noncash additions to operating lease assets	96	28
Continuing operations
Cash and Cash Equivalents [Line Items]
Cash paid for income taxes	79	144
Discontinued operations
Cash and Cash Equivalents [Line Items]
Cash paid for income taxes	$ 10	$ 38

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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