Unaudited Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Billions	Jun. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
PROPERTY AND EQUIPMENT, accumulated depreciation	$ 1.6	$ 1.5
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock authorized (in shares)	5,000,000	5,000,000
Preferred stock issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock authorized (in shares)	1,500,000,000	1,500,000,000
Common stock issued (in shares)	102,562,149	102,562,149
Treasury stock (in shares)	15,347,017	13,212,974

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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