Debt - Summary of Debt (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Other debt	$ 11	$ 19
Total debt	5,137	5,607
Short-term debt and current portion of long-term debt	(253)	(466)
Long-term debt	4,884	5,141
3.15% senior notes due 2021
Debt Instrument [Line Items]
Senior notes	0	94
3.75% senior notes due 2021
Debt Instrument [Line Items]
Senior notes	0	369
4.00% senior notes due 2022
Debt Instrument [Line Items]
Senior notes	250	250
3.85% senior notes due 2023
Debt Instrument [Line Items]
Senior notes	1,086	1,090
4.00% senior notes due 2024
Debt Instrument [Line Items]
Senior notes	200	200
4.875% senior notes due 2025
Debt Instrument [Line Items]
Senior notes	494	492
3.90% senior notes due 2025
Debt Instrument [Line Items]
Senior notes	47	47
4.20% senior notes due 2026
Debt Instrument [Line Items]
Senior notes	1,975	1,973
5.375% senior notes due 2036
Debt Instrument [Line Items]
Senior notes	416	416
5.50% senior notes due 2046
Debt Instrument [Line Items]
Senior notes	$ 658	$ 657

Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt classified as other.

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