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Bonds Payable - Major Terms of Overseas Unsecured Bonds (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
Bonds payable [line items]  
Repayment and Interest Payment Bullet repayment (callable at any time, in whole or in part, at the relevant redemption price according to relevant agreements); interest payable semi-annually
Overseas [member] | Issuance period one [Member]  
Bonds payable [line items]  
Overseas unsecured bonds $ 1,000.0
Overseas [member] | Issuance period two [Member]  
Bonds payable [line items]  
Overseas unsecured bonds 750.0
Overseas [member] | Issuance period three [Member]  
Bonds payable [line items]  
Overseas unsecured bonds 1,250.0
Overseas [member] | Issuance Period Four [Member]  
Bonds payable [line items]  
Overseas unsecured bonds 1,100.0
Overseas [member] | Issuance Period Five [Member]  
Bonds payable [line items]  
Overseas unsecured bonds 900.0
Overseas [member] | Issuance Period Six [Member]  
Bonds payable [line items]  
Overseas unsecured bonds 1,500.0
Overseas [member] | Issuance Period Seven [Member]  
Bonds payable [line items]  
Overseas unsecured bonds 1,250.0
Overseas [member] | Issuance Period Eight [Member]  
Bonds payable [line items]  
Overseas unsecured bonds 1,250.0
Overseas [member] | Issuance Period Nine [Member]  
Bonds payable [line items]  
Overseas unsecured bonds 1,000.0
Overseas [member] | Issuance Period Ten [Member]  
Bonds payable [line items]  
Overseas unsecured bonds 1,000.0
Overseas [member] | Issuance Period Eleven [Member]  
Bonds payable [line items]  
Overseas unsecured bonds 1,000.0
Overseas [member] | Issuance Period Twelve [Member]  
Bonds payable [line items]  
Overseas unsecured bonds 500.0
Overseas [member] | Issuance Period Thirteen [Member]  
Bonds payable [line items]  
Overseas unsecured bonds 1,000.0
Overseas [member] | Issuance Period Fourteen [Member]  
Bonds payable [line items]  
Overseas unsecured bonds 1,000.0
Overseas [member] | Issuance Period Fifteen [Member]  
Bonds payable [line items]  
Overseas unsecured bonds 400.0
Overseas [member] | Issuance Period Sixteen [Member]  
Bonds payable [line items]  
Overseas unsecured bonds $ 600.0
Overseas unsecured bonds [member] | Issuance period one [Member]  
Bonds payable [line items]  
Issuance starting period 2020-09
Issuance ending period 2025-09
Coupon Rate 0.75%
Repayment and Interest Payment Bullet repayment (callable at any time, in whole or in part, at the relevant redemption price according to relevant agreements); interest payable semi-annually
Overseas unsecured bonds [member] | Issuance period two [Member]  
Bonds payable [line items]  
Issuance starting period 2020-09
Issuance ending period 2027-09
Coupon Rate 1.00%
Repayment and Interest Payment Bullet repayment (callable at any time, in whole or in part, at the relevant redemption price according to relevant agreements); interest payablesemi-annually
Overseas unsecured bonds [member] | Issuance period three [Member]  
Bonds payable [line items]  
Issuance starting period 2020-09
Issuance ending period 2030-09
Coupon Rate 1.375%
Overseas unsecured bonds [member] | Issuance Period Four [Member]  
Bonds payable [line items]  
Issuance starting period 2021-04
Issuance ending period 2026-04
Coupon Rate 1.25%
Repayment and Interest Payment Bullet repayment (callable at any time, in whole or in part, at the relevant redemption price according to relevant agreements); interest payable semi-annually
Overseas unsecured bonds [member] | Issuance Period Five [Member]  
Bonds payable [line items]  
Issuance starting period 2021-04
Issuance ending period 2028-04
Coupon Rate 1.75%
Repayment and Interest Payment Bullet repayment (callable at any time, in whole or in part, at the relevant redemption price according to relevant agreements); interest payable semi-annually
Overseas unsecured bonds [member] | Issuance Period Six [Member]  
Bonds payable [line items]  
Issuance starting period 2021-04
Issuance ending period 2031-04
Coupon Rate 2.25%
Repayment and Interest Payment Bullet repayment (callable at any time, in whole or in part, at the relevant redemption price according to relevant agreements); interest payable semi-annually
Overseas unsecured bonds [member] | Issuance Period Seven [Member]  
Bonds payable [line items]  
Issuance starting period 2021-10
Issuance ending period 2026-10
Coupon Rate 1.75%
Repayment and Interest Payment Bullet repayment (callable at any time, in whole or in part, at the relevant redemption price according to relevant agreements); interest payable semi-annually
Overseas unsecured bonds [member] | Issuance Period Eight [Member]  
Bonds payable [line items]  
Issuance starting period 2021-10
Issuance ending period 2031-10
Coupon Rate 2.50%
Repayment and Interest Payment Bullet repayment (callable at any time, in whole or in part, at the relevant redemption price according to relevant agreements); interest payable semi-annually
Overseas unsecured bonds [member] | Issuance Period Nine [Member]  
Bonds payable [line items]  
Issuance starting period 2021-10
Issuance ending period 2041-10
Coupon Rate 3.125%
Repayment and Interest Payment Bullet repayment (callable at any time, in whole or in part, at the relevant redemption price according to relevant agreements); interest payable semi-annually
Overseas unsecured bonds [member] | Issuance Period Ten [Member]  
Bonds payable [line items]  
Issuance starting period 2021-10
Issuance ending period 2051-10
Coupon Rate 3.25%
Overseas unsecured bonds [member] | Issuance Period Eleven [Member]  
Bonds payable [line items]  
Issuance starting period 2022-04
Issuance ending period 2027-04
Coupon Rate 3.875%
Repayment and Interest Payment Bullet repayment (callable at any time, in whole or in part, at the relevant redemption price according to relevant agreements); interest payable semi-annually
Overseas unsecured bonds [member] | Issuance Period Twelve [Member]  
Bonds payable [line items]  
Issuance starting period 2022-04
Issuance ending period 2029-04
Coupon Rate 4.125%
Repayment and Interest Payment Bullet repayment (callable at any time, in whole or in part, at the relevant redemption price according to relevant agreements); interest payable semi-annually
Overseas unsecured bonds [member] | Issuance Period Thirteen [Member]  
Bonds payable [line items]  
Issuance starting period 2022-04
Issuance ending period 2032-04
Coupon Rate 4.25%
Repayment and Interest Payment Bullet repayment (callable at any time, in whole or in part, at the relevant redemption price according to relevant agreements); interest payable semi-annually
Overseas unsecured bonds [member] | Issuance Period Fourteen [Member]  
Bonds payable [line items]  
Issuance starting period 2022-04
Issuance ending period 2052-04
Coupon Rate 4.50%
Repayment and Interest Payment Bullet repayment (callable at any time, in whole or in part, at the relevant redemption price according to relevant agreements); interest payable semi-annually
Overseas unsecured bonds [member] | Issuance Period Fifteen [Member]  
Bonds payable [line items]  
Issuance starting period 2022-07
Issuance ending period 2027-07
Coupon Rate 4.375%
Repayment and Interest Payment Bullet repayment (callable at any time, in whole or in part, at the relevant redemption price according to relevant agreements); interest payable semi-annually
Overseas unsecured bonds [member] | Issuance Period Sixteen [Member]  
Bonds payable [line items]  
Issuance starting period 2022-07
Issuance ending period 2032-07
Coupon Rate 4.625%
Repayment and Interest Payment Bullet repayment (callable at any time, in whole or in part, at the relevant redemption price according to relevant agreements); interest payable semi-annually