Consolidated Statements of Financial Position (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Allowance for doubtful accounts	$ 92	$ 104
Stockholders' Equity:
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	193,747,509	193,770,617
Common stock, shares outstanding (in shares)	193,747,509	193,770,617