Financial Instruments and Fair Value Measurements - Carrying Amounts and Estimated Fair Values of Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value of Debt	$ 32,262,055	$ 30,879,263
Fair Value of Debt	30,249,484	28,611,253
Credit Facilities and Commercial Paper [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value of Debt	532,132	224,966
Fair Value of Debt	532,391	224,966
Senior Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value of Debt	29,390,246	28,322,163
Fair Value of Debt	27,438,063	26,095,901
Term Loans and Unsecured Other [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value of Debt	2,021,761	2,013,317
Fair Value of Debt	1,974,677	1,991,934
Secured Mortgage [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value of Debt	317,916	318,817
Fair Value of Debt	$ 304,353	$ 298,452