Prepetition Revolving Credit Facility, Senior Notes and Exit Debt - Summary of Senior Notes (Detail) $ in Thousands	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Total Senior Notes, net	$ 2,000,000
3.45% Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Total Senior Notes, net	250,000
7.875% Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Total Senior Notes, net	500,000
5.70% Senior Notes due 2039 [Member]
Debt Instrument [Line Items]
Total Senior Notes, net	500,000
4.875% Senior Notes due 2043 [Member]
Debt Instrument [Line Items]
Total Senior Notes, net	$ 750,000