Debt (Tables)

9 Months Ended

Sep. 30, 2021

Debt Disclosure [Abstract]

Approximate Fair Value and Related Carrying Value of Long-term Debt, Including Current Maturities

The approximate fair value and related carrying value of the Company's total long-term debt, including current maturities of long-term debt presented as short-term debt, as of September 30, 2021 and December 31, 2020 were as follows:

In millions	September 30, 2021		December 31, 2020
Fair value	$	8,451	$	9,412
Carrying value	7,551		8,122