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Long-term Debt - Additional Information (Detail) € in Millions, $ in Millions		3 Months Ended		6 Months Ended	12 Months Ended
	Jul. 29, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 EUR (€)	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2020 EUR (€)	Dec. 31, 2019 EUR (€)
Debt Instrument [Line Items]
Long-term debt, fair value		$ 17,300		$ 17,300	$ 15,300
Committed credit facility agreement aggregated		7,980		7,980
Unused credit facility		6,170		6,170
Debt instrument premium paid on repurchase		40
Long-term debt, carrying amount		$ 16,763		$ 16,763	$ 14,770
0.25% Notes due 2027
Debt Instrument [Line Items]
Notes, face amount | €			€ 400			€ 1,000	€ 500
Debt instrument interest rate		0.25%	0.25%	0.25%	0.25%	0.25%	0.25%
Debt instrument maturity date			2027	2027	2027
Long-term debt, carrying amount		$ 1,008		$ 1,008	$ 550
0.50% Notes due 2031
Debt Instrument [Line Items]
Notes, face amount | €			€ 400				€ 500
Debt instrument interest rate		0.50%	0.50%	0.50%	0.50%	0.50%	0.50%
Debt instrument maturity date			2031	2031	2031
Long-term debt, carrying amount		$ 1,008		$ 1,008	$ 544
1.375% Notes due 2026
Debt Instrument [Line Items]
Notes, face amount | €						€ 1,000
Debt instrument interest rate		1.375%		1.375%	1.375%	1.375%	1.375%
Debt instrument maturity date		2026		2026	2026
Long-term debt, carrying amount		$ 1,119		$ 1,119
2.65% Senior Notes due 2030
Debt Instrument [Line Items]
Notes, face amount | €						€ 900
Debt instrument interest rate		2.65%		2.65%	2.65%	2.65%	2.65%
Debt instrument maturity date		2030		2030	2030
Long-term debt, carrying amount		$ 892		$ 892
2.0% Notes due 2032
Debt Instrument [Line Items]
Notes, face amount		$ 1,000		$ 1,000
Debt instrument interest rate		2.00%		2.00%	2.00%	2.00%	2.00%
Debt instrument maturity date		2032		2032	2032
Long-term debt, carrying amount		$ 1,119		$ 1,119
4.20% Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument interest rate		4.20%		4.20%	4.20%	4.20%	4.20%
Debt instrument maturity date		2021		2021	2021
Debt instrument, repurchase amount		$ 600		$ 600
Long-term debt, carrying amount					$ 600
3.30% Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument interest rate		3.30%		3.30%	3.30%	3.30%	3.30%
Debt instrument maturity date		2021		2021	2021
Debt instrument, repurchase amount		$ 935		$ 935
Long-term debt, carrying amount		664		664	$ 1,597
Commercial paper programs mature in April 2021
Debt Instrument [Line Items]
Committed credit facility agreement aggregated		1,730		1,730
Commercial paper programs mature in February 2023
Debt Instrument [Line Items]
Committed credit facility agreement aggregated		2,750		2,750
Commercial paper programs mature in July 2024
Debt Instrument [Line Items]
Committed credit facility agreement aggregated		1,500		1,500
Commercial paper programs mature in February 2025
Debt Instrument [Line Items]
Committed credit facility agreement aggregated		2,000		2,000
Commercial paper borrowings
Debt Instrument [Line Items]
Long-term debt		1,810		1,810	2,220
Long-term debt, carrying amount		$ 1,812		$ 1,812	$ 2,222
Guaranteed Euro Medium Term Note Program
Debt Instrument [Line Items]
Long-term debt, carrying amount | €						€ 5,000
Revolving Credit Facility
Debt Instrument [Line Items]
Committed credit facility agreement aggregated | €						€ 1,540
Credit facility extended period		1 year
Credit facility drawn	$ 0

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