Schedule of Estimated Fair Value (Detail) - USD ($) $ in Thousands	Jun. 20, 2021	Jan. 03, 2021
2015 Ten-Year Fixed Rate Notes [Member]
Debt Instrument [Line Items]
Principal Amount	$ 764,000	$ 766,000
Fair Value	802,200	809,662
2017 Five-Year Fixed Rate Notes [Member]
Debt Instrument [Line Items]
Principal Amount		582,000
Fair Value		582,582
2017 Ten-Year Fixed Rate Notes [Member]
Debt Instrument [Line Items]
Principal Amount	967,500	970,000
Fair Value	1,032,323	1,035,960
2017 Five-Year Floating Rate Notes [Member]
Debt Instrument [Line Items]
Principal Amount		291,000
Fair Value		291,000
2018 7.5-Year Fixed Rate Notes [Member]
Debt Instrument [Line Items]
Principal Amount	414,375	415,438
Fair Value	433,022	437,456
2018 9.25-Year Fixed Rate Notes [Member]
Debt Instrument [Line Items]
Principal Amount	390,000	391,000
Fair Value	422,370	422,280
2019 Ten-Year Fixed Rate Notes [Member]
Debt Instrument [Line Items]
Principal Amount	666,563	668,250
Fair Value	715,222	$ 712,355
2021 7.5-Year Fixed Rate Notes
Debt Instrument [Line Items]
Principal Amount	850,000
Fair Value	872,950
2021 Ten-Year Fixed Rate Notes
Debt Instrument [Line Items]
Principal Amount	1,000,000
Fair Value	$ 1,042,000