Financial Instruments and Fair Value Measurements - Carrying Amounts and Estimated Fair Values of Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value of Debt	$ 34,666,551	$ 30,879,263
Fair Value of Debt	32,552,950	28,611,253
Credit Facilities and Commercial Paper [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value of Debt	520,194	224,966
Fair Value of Debt	520,194	224,966
Senior Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value of Debt	31,706,006	28,322,163
Fair Value of Debt	29,633,204	26,095,901
Term Loans and Unsecured Other [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value of Debt	2,114,625	2,013,317
Fair Value of Debt	2,086,471	1,991,934
Secured Mortgage [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value of Debt	325,726	318,817
Fair Value of Debt	$ 313,081	$ 298,452