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Income Taxes - Additional Information (Details) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
	Mar. 04, 2019	Sep. 29, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Total net state income tax expense				$ 197	$ 96	$ 83
Deduction for foreign derived intangible income enacted by the Tax Act, current and prior year				191	220
Foreign derived intangible income deduction related to prior year	$ 75	$ 62	$ 65	21	98
Recognized tax benefit				0	15	$ 61
Unrecognized tax benefits				0	0
Federal and foreign income tax payments made, net of refunds received				$ 1,400	$ 940

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Effective Income Tax Rate Reconciliation, Change in Tax Accounting Method, Amount

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Effective Income Tax Rate Reconciliation, Deduction, Foreign Derived Intangible Income, Prior And Current Years

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense (benefit).

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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 state and local current and deferred income tax expense (benefit) attributable to continuing operations.

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Amount of unrecognized tax benefits.

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