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Leases - Reconciliation of Total Lease Payments, on Undiscounted Basis, to Lease Liability on Balance Sheet (Detail) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
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Lessee Lease Description [Line Items] |  |  |
Weighted-average discount rate - operating leases | 5.30% | 5.30% | 5.30%
2025 | $ 38 |  |
2026 | 37 |  |
2027 | 36 |  |
2028 | 36 |  |
2029 | 36 |  |
Thereafter | 1,358 |  |
Total undiscounted cash flows | 1,541 |  |
Long-term lease liabilities | 560 |  |
Total lease liabilities | 560 | $ 563 |
Difference between undiscounted cash flows and discounted cash flows | $ 981 |  |
Ground Leases |  |  |
Lessee Lease Description [Line Items] |  |  |
Weighted-average discount rate - operating leases | 5.40% |  |
2025 | $ 31 |  |
2026 | 31 |  |
2027 | 31 |  |
2028 | 31 |  |
2029 | 31 |  |
Thereafter | 1,325 |  |
Total undiscounted cash flows | 1,480 |  |
Long-term lease liabilities | 511 |  |
Total lease liabilities | 511 |  |
Difference between undiscounted cash flows and discounted cash flows | $ 969 |  |
Office Leases and Other |  |  |
Lessee Lease Description [Line Items] |  |  |
Weighted-average discount rate - operating leases | 3.70% |  |
2025 | $ 7 |  |
2026 | 6 |  |
2027 | 5 |  |
2028 | 5 |  |
2029 | 5 |  |
Thereafter | 33 |  |
Total undiscounted cash flows | 61 |  |
Long-term lease liabilities | 49 |  |
Total lease liabilities | 49 |  |
Difference between undiscounted cash flows and discounted cash flows | $ 12 |  |

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- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease due after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
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