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Percentage of senior secured credit facility over eligible accounts receivable.

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Amount of short-term and long-term debt and lease obligation.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Nominal or face amount used to calculate payments on the derivative liability.

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The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Date the credit facility terminates, in CCYY-MM-DD format.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Long-Term Debt - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Feb. 29, 2020
Debt Instrument [Line Items]
Pretax loss on retirement of debt		$ 295,000,000	$ 211,000,000	$ 9,000,000
Capital leases and other secured debt		767,000,000
Maturity of long-term debt in 2022		233,000,000
Maturity of long-term debt in 2023		2,799,000,000
Maturity of long-term debt in 2024		3,163,000,000
Maturity of long-term debt in 2025		$ 5,872,000,000
Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, maturities range		2022
Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, maturities range		2025
Interest Rate Swaps [Member]
Debt Instrument [Line Items]
Notional amount, total		$ 2,500,000,000
Federal Fund Rate [Member]
Debt Instrument [Line Items]
Debt instrument basis spread		0.50%
Asset-Based Revolving Credit Facility Maturing on June 28, 2022 [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 3,750,000,000
Debt instrument maturity date		Jun. 28, 2022
Percentage of senior secured credit facility over eligible accounts receivable		85.00%
Line of credit outstanding		$ 0
Senior Secured Revolving Credit Facility Maturing On June 28, 2022 [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 2,000,000,000.000
Debt instrument maturity date		Jun. 28, 2022
Line of credit outstanding		$ 0
Senior Secured Term Loan A-6 Facility Maturing On July 16, 2024 [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 1,078,000,000.000
Debt instrument maturity date		Jul. 16, 2024
Senior Secured Term Loan B-12 Facility Maturing On March 13, 2025 [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 1,459,000,000
Debt instrument maturity date		Mar. 13, 2025
Senior Secured Term Loan B-13 Facility Maturing On March 18, 2026 [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 1,134,000,000
Debt instrument maturity date		Mar. 18, 2026
Senior Secured Revolving Credit Facility Maturing On March 19, 2021
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 2,000,000,000.000
Debt instrument maturity date		Mar. 18, 2021
Line of credit outstanding		$ 0
Senior Unsecured Note Maturities Ranging 2021 to 2033 [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount		$ 12,091,000,000.000
Senior Unsecured Note Maturities Ranging 2021 to 2033 [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, maturities range		2023
Senior Unsecured Note Maturities Ranging 2021 to 2033 [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, maturities range		2033
Senior Unsecured Note Maturity Year 2025 [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount		$ 125,000,000
Senior Unsecured Note Maturities Ranging 2023 to 2095 [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount		$ 736,000,000
Senior Unsecured Note Maturities Ranging 2023 to 2095 [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, maturities range		2023
Senior Unsecured Note Maturities Ranging 2023 to 2095 [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, maturities range		2095
Secured Debt [Member]
Debt Instrument [Line Items]
Pretax loss on retirement of debt		$ 295,000,000
6.25% Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Early Repayment of Senior Debt	$ 1,000,000,000.000
Debt Instrument, Redemption Price, Percentage	6.25%
7.50% Senior Notes Due 2022 [Member]
Debt Instrument [Line Items]
Early Repayment of Senior Debt	$ 2,000,000,000.000
Debt Instrument, Redemption Price, Percentage	7.50%
Senior Notes [Member] \| Senior Secured Notes Due 2023 [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount		$ 1,250,000,000
Debt instrument, stated interest		4.75%
Senior Notes [Member] \| Senior Secured Notes Due 2024 [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount		$ 2,000,000,000.000
Debt instrument, stated interest		5.00%
Senior Notes [Member] \| Senior Secured Notes Due 2025 [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount		$ 1,400,000,000
Debt instrument, stated interest		5.25%
Senior Notes [Member] \| Senior Secured Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount		$ 1,500,000,000
Debt instrument, stated interest		5.25%
Senior Notes [Member] \| Senior Secured Notes Due 2027 [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount		$ 1,200,000,000
Debt instrument, stated interest		4.50%
Senior Notes [Member] \| Senior Secured Notes Due 2029 [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount		$ 2,000,000,000.000
Debt instrument, stated interest		4.125%
Senior Notes [Member] \| Senior Secured Notes Due 2047 [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount		$ 1,500,000,000
Debt instrument, stated interest		5.50%
Senior Notes [Member] \| Senior Secured Notes Due 2049 [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount		$ 2,000,000,000.000
Debt instrument, stated interest		5.25%
Senior Notes [Member] \| 5.13% Senior Notes Due 2039 [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount		$ 1,000,000,000.000
Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount					$ 2,700,000,000
Debt instrument, stated interest					3.50%
Senior Secured Three Six Four Day Term Loan Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 2,000,000,000.000