Notes Payable, Other and Short-Term Borrowings - Summary Notes Payable, Other and Short-term Borrowings (Parenthetical) (Detail)	Sep. 30, 2020	Aug. 14, 2020	Jul. 10, 2020	Dec. 31, 2019	Sep. 27, 2019	Jul. 24, 2018
5.125% Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate	5.125%	5.125%		5.125%
5.375% Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate	5.375%			5.375%		5.375%
3.750% Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate	3.75%			3.75%	3.75%
4.375% Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate	4.375%		4.375%	4.375%