Fair Value Of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2022

Fair Value Of Financial Instruments [Abstract]

Fair Value Of Long-Term Debt

	March 31, 2022				December 31, 2021
($ in millions)		Carrying Amount		Fair Value		Carrying Amount		Fair Value
Total debt	$	7,774	$	7,543	$	7,777	$	7,996