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Notes and Contracts Payable (Schedule of Notes and Contracts Payable) (Detail) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Trust deed note due November 1, 2023, collateralized by land and buildings with net book values of $36 and $37 at December 31, 2022 and 2021, respectively, fixed interest rate of 5.26% $ 4 $ 8
Other notes and contracts payable with maturities through 2027, weighted-average interest rates of 3.30% and 4.21% at December 31, 2022 and 2021, respectively 4 4
Debt And Capital Lease Obligations Before Discounts Premiums Debt Issuance Costs 1,658 1,662
Unamortized discounts and debt issuance costs (12) (14)
Notes and contracts payable net of unamortized discount and debt issuance costs 1,646 1,648
2.40% unsecured notes    
Debt Instrument [Line Items]    
Senior unsecured notes 650 650
4.00% unsecured notes    
Debt Instrument [Line Items]    
Senior unsecured notes 450 450
4.60% unsecured notes    
Debt Instrument [Line Items]    
Senior unsecured notes 300 300
4.30% unsecured notes    
Debt Instrument [Line Items]    
Senior unsecured notes $ 250 $ 250