Supplemental Disclosures (Schedule of Supplemental Cash Flow Information) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disclosure Text Block Supplement [Abstract]
Cash paid for taxes, net		$ 353	$ 499
Cash paid for interest, net		516	541
Non-cash investing and financing activities:
Disposal of UKTV investment and acquisition of Lifestyle Business		0	291
Unsettled stock repurchases	$ 50	14	0
Accrued purchases of property and equipment		33	41
Assets acquired under finance lease and other arrangements		$ 79	$ 13

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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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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Amount of noncash consideration received for selling an asset or business through a noncash (or part noncash) transaction.

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Amount of increase in right-of-use asset obtained in exchange for finance lease liability.

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