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Stock Incentive Plans - Narrative (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock Incentive Plans Narratives [Abstract]
Compensation expense	$ 391	$ 351	$ 456
Unrecognized compensation expense	$ 235
Weighted-average period for total unrecognized compensation expense for nonvested equity awards	1 year 1 month 6 days
Fair value of stock incentive awards vested	$ 258	$ 275	$ 287
Performance Share Units (PSUs)
Stock Incentive Plans Narratives [Abstract]
Performance period	3 years
Stock options
Stock Incentive Plans Narratives [Abstract]
Expiration period	10 years
Dividend yield	1.67%	4.25%	3.90%
Expected volatility rate	47.80%	26.20%	28.00%
Risk-free interest rate	0.76%	1.44%	2.62%
Expected option life	6 years	5 years 11 months 19 days	6 years
Performance-based Employee Stock Options
Stock Incentive Plans Narratives [Abstract]
Service period	55 months
Service-based Employee Stock Options | Minimum
Stock Incentive Plans Narratives [Abstract]
Service period	19 months
Service-based Employee Stock Options | Maximum
Stock Incentive Plans Narratives [Abstract]
Service period	3 years
Restricted Stock Awards (RSAs)
Stock Incentive Plans Narratives [Abstract]
Service period	3 years
Restricted Stock Units (RSUs)
Stock Incentive Plans Narratives [Abstract]
Service period	3 years
Cruise Stock Incentive Awards | Stock options
Stock Incentive Plans Narratives [Abstract]
Expiration period	10 years
Weighted-average period for total unrecognized compensation expense for nonvested equity awards	5 years 4 months 24 days
Granted (in shares)	3,300
Weighted average exercise price, Granted (in dollars per share)	$ 13.54
Cruise Stock Incentive Awards | Stock options | Minimum
Stock Incentive Plans Narratives [Abstract]
Service period	4 years
Cruise Stock Incentive Awards | Stock options | Maximum
Stock Incentive Plans Narratives [Abstract]
Service period	10 years
Cruise Stock Incentive Awards | Restricted Stock Units (RSUs)
Stock Incentive Plans Narratives [Abstract]
Compensation expense	$ 0	$ 0	$ 0
Granted (in shares)	29,400
Weighted average grant fate fair value, Granted (in dollars per share)	$ 25.15
Total units outstanding (in shares)	66,200
Cruise Stock Incentive Awards | Restricted Stock Units (RSUs) | Maximum
Stock Incentive Plans Narratives [Abstract]
Service period	4 years
Cruise Stock Incentive Awards | Stock options and RSUs
Stock Incentive Plans Narratives [Abstract]
Unrecognized compensation expense	$ 1,300
Total units outstanding (in shares)	90,000

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