Equity and Earnings Per Share (Details) $ / shares in Units, $ in Millions									1 Months Ended			3 Months Ended			6 Months Ended
	Jun. 28, 2018 $ / shares	Jun. 22, 2018 $ / shares	Mar. 30, 2018 $ / shares	Feb. 23, 2018 $ / shares	Jun. 30, 2017 $ / shares	Jun. 23, 2017 $ / shares	Mar. 31, 2017 $ / shares	Feb. 24, 2017 $ / shares	Jul. 31, 2018 $ / shares	Jun. 30, 2018 USD ($) shares	Nov. 30, 2016 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($) $ / shares shares	Jun. 30, 2017 $ / shares	Jun. 30, 2018 USD ($) $ / shares shares	Jun. 30, 2017 USD ($) $ / shares shares	Mar. 31, 2018 USD ($)	Dec. 31, 2017 shares
Class of Stock [Line Items]
Preferred stock, shares authorized | shares										50,000,000			50,000,000		50,000,000			50,000,000
Common stock, dividends paid (per share) | $ / shares	$ 0.75		$ 0.75		$ 0.73		$ 0.73
Common stock, dividends declared															$ 1,804	$ 1,781
Common stock, dividends declared (per share) | $ / shares													$ 0.75	$ 0.73	$ 1.5	$ 1.46
Common stock repurchased (in shares) | shares															2,301,800	3,933,737
Payments for repurchase of common stock															$ 175	$ 225
Sands China Ltd [Member]
Class of Stock [Line Items]
Common stock, dividends paid (per share) | $ / shares		$ 1.00		$ 0.99		$ 1.00		$ 0.99
Common stock, dividends declared															2,050	2,070
Subsequent Event [Member]
Class of Stock [Line Items]
Common stock, dividends declared (per share) | $ / shares									$ 0.75
November 2016 Program [Member]
Class of Stock [Line Items]
Stock repurchase program, authorized amount											$ 1,560
Stock repurchase program, expiration											Nov. 02, 2018
Stock repurchase program, remaining authorized repurchase amount																	$ 1,110
June 2018 Program [Member]
Class of Stock [Line Items]
Stock repurchase program, expiration										Nov. 02, 2020
Stock repurchase program, remaining authorized repurchase amount										$ 2,500			$ 2,500		2,500
Sands China Ltd [Member]
Class of Stock [Line Items]
Proceeds from dividends received															1,440	1,450
Retained Earnings [Member]
Class of Stock [Line Items]
Common stock, dividends declared															1,183	1,156
Retained Earnings [Member] | Scenario, Forecast [Member]
Class of Stock [Line Items]
Common stock, dividends declared												$ 591
Retained Earnings [Member] | All Other Shareholders [Member]
Class of Stock [Line Items]
Common stock, dividends declared															535	526
Retained Earnings [Member] | Principal Stockholder and His Family [Member]
Class of Stock [Line Items]
Common stock, dividends declared															648	630
Noncontrolling Interest [Member]
Class of Stock [Line Items]
Common stock, dividends declared															621	625
Noncontrolling Interest [Member] | Other [Member]
Class of Stock [Line Items]
Common stock, dividends declared															$ 6	$ 6