Consolidated Statements of Financial Position (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Consolidated Statements of Financial Position [Abstract]
Allowance for receivables (in dollars)	$ 24	$ 21
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares issued (in shares)	147,872,959	147,209,928
Common stock, shares outstanding (in shares)	135,408,054	135,687,558
Treasury stock (in shares)	12,464,905	11,522,370