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Long-Term Debt - Long-Term Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2020
Debt Instrument [Line Items]
Less: Current portion of long-term debt	$ (637,424)	$ (2,326)
Long-term debt, net of current portion	$ 5,662,567	6,826,566
Notes payable
Debt Instrument [Line Items]
Debt Instrument, stated interest rate	3.50%
Notes payable			$ 26,000
3.8% Senior Notes due 2024
Debt Instrument [Line Items]
Debt Instrument, stated interest rate	3.80%
4.375% Senior Notes Due 2028
Debt Instrument [Line Items]
Debt Instrument, stated interest rate	4.375%
4.9% Senior Notes due 2044
Debt Instrument [Line Items]
Debt Instrument, stated interest rate	4.90%
Senior Notes due 2031
Debt Instrument [Line Items]
Debt Instrument, stated interest rate	5.75%
Carrying Amount
Debt Instrument [Line Items]
Credit facility	$ 0	500,000
Notes payable	21,207	22,356
Total debt	6,299,991	6,828,892
Carrying Amount \| 4 1/2% Senior Notes Due 2023
Debt Instrument [Line Items]
Senior notes	635,056	648,078
Carrying Amount \| 3.8% Senior Notes due 2024
Debt Instrument [Line Items]
Senior notes	890,819	908,061
Carrying Amount \| 4.375% Senior Notes Due 2028
Debt Instrument [Line Items]
Senior notes	992,471	991,880
Carrying Amount \| 4.9% Senior Notes due 2044
Debt Instrument [Line Items]
Senior notes	692,155	692,056
Carrying Amount \| Senior Notes due 2031
Debt Instrument [Line Items]
Senior notes	1,483,070	1,482,319
Carrying Amount \| Two Point Two Six Eight Percent Senior Notes due 2026
Debt Instrument [Line Items]
Senior notes	793,337	792,621
Carrying Amount \| Two Point Eight Seven Five Percent Senior Notes due 2032
Debt Instrument [Line Items]
Senior notes	791,876	791,521
Estimated Fair Value
Debt Instrument [Line Items]
Credit facility	0	500,000
Notes payable	19,800	22,000
Total debt	5,820,800	7,351,100
Estimated Fair Value \| 4 1/2% Senior Notes Due 2023
Debt Instrument [Line Items]
Senior notes	636,900	670,200
Estimated Fair Value \| 3.8% Senior Notes due 2024
Debt Instrument [Line Items]
Senior notes	885,300	950,000
Estimated Fair Value \| 4.375% Senior Notes Due 2028
Debt Instrument [Line Items]
Senior notes	939,900	1,082,100
Estimated Fair Value \| 4.9% Senior Notes due 2044
Debt Instrument [Line Items]
Senior notes	555,200	781,500
Estimated Fair Value \| Senior Notes due 2031
Debt Instrument [Line Items]
Senior notes	1,447,300	1,769,600
Estimated Fair Value \| Two Point Two Six Eight Percent Senior Notes due 2026
Debt Instrument [Line Items]
Senior notes	708,500	795,200
Estimated Fair Value \| Two Point Eight Seven Five Percent Senior Notes due 2032
Debt Instrument [Line Items]
Senior notes	$ 627,900	$ 780,500