Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Financial Assets And Liabilities Carried At Fair Value

A summary of financial assets and liabilities that are measured at fair value on a recurring basis were as follows ($ in millions):

	Year Ended December 31				Quoted Prices in Active Market (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
	2021		2020		2021		2020		2021		2020		2021		2020
Assets:
Available-for-sale debt securities	$	20	$	27	$	—	$	—	$	20	$	27	$	—	$	—
Investment in equity securities	336		176		88		6		—		—		—		—
Cross-currency swap derivative contracts	50		—		—		—		50		—		—		—
Liabilities:
Cross-currency swap derivative contracts	—		622		—		—		—		622		—		—

Carrying Amounts And Fair Values Of Financial Instruments

The carrying amounts and fair values of the Company’s other financial instruments as of December 31 were as follows ($ in millions):

	2021				2020
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Debt obligations:
Notes payable and current portion of long-term debt	$	8	$	8	$	11	$	11
Long-term debt	22,168		22,796		21,193		23,004