Debt - Summary of Debt Instruments (Parenthetical) (Detail)	Apr. 01, 2020	Mar. 31, 2020	Mar. 20, 2020	Dec. 31, 2019
2.700% [Member] | Due in 2020 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate	2.70%	2.70%		2.70%
3.375% [Member] | Due in 2021 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate		3.375%		3.375%
3.150% [Member] | Due in 2022 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate		3.15%		3.15%
3.700% [Member] | Due in 2023 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate		3.70%		3.70%
3.050% [Member] | Due in 2026 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate		3.05%	3.05%
3.550% [Member] | Due in 2025 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate		3.55%		3.55%
3.550% [Member] | Due in 2030 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate		3.55%	3.55%
4.250% [Member] | Due in 2035 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate		4.25%		4.25%
5.750% [Member] | Due in 2039 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate		5.75%		5.75%
4.450% [Member] | Due in 2045 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate		4.45%		4.45%
1.414% [Member] | Due in 2022 [Member] | Euro Notes [Member]
Debt Instrument [Line Items]
Interest rate		1.414%		1.414%
2.425% [Member] | Due in 2026 [Member] | Euro Notes [Member]
Debt Instrument [Line Items]
Interest rate		2.425%		2.425%
1.164% [Member] | Due in 2027 [Member] | Euro Notes [Member]
Debt Instrument [Line Items]
Interest rate		1.164%		1.164%