CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - Parenthetical - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Accounts receivable, reserves	$ 4	$ 5
Property and equipment, accumulated depreciation	125	106
Other intangibles, accumulated amortization	$ 562	$ 470
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	675,000,000	675,000,000
Common stock, shares issued (in shares)	137,731,865	136,017,964
Common stock, shares outstanding (in shares)	137,731,865	136,017,964