CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	453,541,000	451,617,000
Common stock, shares outstanding (in shares)	442,890,000	441,060,000
Treasury stock, shares (in shares)	10,651,000	10,557,000