Note 2 - Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Restrictions on Cash and Cash Equivalents [Table Text Block]

Millions	2023		2022		2021
Cash and cash equivalents	$	1,055	$	973	$	960
Restricted cash equivalents in other current assets		10		10		19
Restricted cash equivalents in other assets		9		4		4
Total cash, cash equivalents, and restricted cash equivalents	$	1,074	$	987	$	983