Capital Stock - Additional Information (Details)					1 Months Ended		12 Months Ended
	Oct. 15, 2021 USD ($)	May 20, 2021 USD ($)	Dec. 31, 2020 USD ($) $ / shares shares	May 05, 2020 USD ($) $ / shares shares	Nov. 30, 2021 shares	May 31, 2021 shares	Dec. 31, 2021 USD ($) vote $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) shares	Feb. 19, 2021 $ / shares	Dec. 30, 2018 shares	Dec. 31, 2015 shares	Dec. 31, 2012 shares	Dec. 31, 2010 shares	Dec. 31, 2006 shares
Class of Stock [Line Items]
Common stock, shares authorized (in shares)			1,600,000,000				1,600,000,000	1,600,000,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.0001				$ 0.0001	$ 0.0001
Common stock warrants, net of issuance costs | $								$ 110,000,000
Preferred stock dividends | $							$ 67,000,000	75,000,000
Loss on redemption of preferred stock | $							$ 214,000,000	$ 0	$ 0
Treasury stock (in shares)			130,767,000				131,813,000	130,767,000
Authorized share repurchase (up to)			105,000,000					105,000,000			15,000,000	10,000,000
Stock repurchased during period, shares							0
Number of shares authorized and remaining under the repurchase program							23,300,000
Board of Directors Chairman
Class of Stock [Line Items]
Authorized share repurchase (up to)									20,000,000				20,000,000	20,000,000	20,000,000
AP Fort Holdings, L.P.
Class of Stock [Line Items]
Proceeds from issuance of private placement | $				$ 588,000,000
Silver Lake Group, LLC
Class of Stock [Line Items]
Proceeds from issuance of private placement | $				$ 588,000,000
Class B Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)			400,000,000				400,000,000	400,000,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.0001				$ 0.0001	$ 0.0001
Number of voting rights to each shareholder, per share | vote							10
Treasury stock (in shares)			7,300,000				7,300,000	7,300,000
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares			$ 0.001				$ 0.001	$ 0.001
Preferred stock, dividend rate, percentage				9.50%
Preferred stock, liquidation preference (in dollars per share) | $ / shares				$ 1,000
Preferred stock | $			$ 1,022,000,000				$ 0	$ 1,022,000,000
Initial discount and issuance costs related to preferred stock | $			$ 68,000,000
Preferred stock, percent of outstanding shares redeemed	50.00%	50.00%
Preferred stock, redemption price, percentage of principal amount redeemed	103.00%	103.00%
Preferred stock, redemption amount | $	$ 635,000,000	$ 640,000,000
Preferred stock redemption premium | $	18,000,000	18,000,000
Preferred stock dividends | $	$ 17,000,000	$ 22,000,000					67,000,000
Loss on redemption of preferred stock | $							214,000,000
Preferred stock, initial discount and issuance costs and warrants | $							178,000,000
Remaining carrying amount | $							$ 0
Preferred dividends declared paid (in dollars per share) | $ / shares							$ 74.96
Series A Preferred Stock | Debt Instrument, Redemption, Period One
Class of Stock [Line Items]
Preferred stock, liquidation preference, percent				103.00%
Series A Preferred Stock | AP Fort Holdings, L.P.
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)				600,000
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.001
Series A Preferred Stock | Silver Lake Group, LLC
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)				600,000
Warrant
Class of Stock [Line Items]
Class of warrant or right, expiration period				10 years
Warrants remain outstanding (in shares)							0
Warrant | AP Fort Holdings, L.P.
Class of Stock [Line Items]
Warrants purchased (in shares)				4,200,000
Class of warrant or right, exercise price of warrants or rights (in dollars per share) | $ / shares				$ 72.00
Shares issued in transaction (in shares)						2,500,000
Warrant | Silver Lake Group, LLC
Class of Stock [Line Items]
Warrants purchased (in shares)				4,200,000
Class of warrant or right, exercise price of warrants or rights (in dollars per share) | $ / shares				$ 72.00
Shares issued in transaction (in shares)					2,600,000
Common Stock
Class of Stock [Line Items]
Treasury stock (in shares)			123,500,000				124,500,000	123,500,000
Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)							1,600,000,000
Common stock, par value (in dollars per share) | $ / shares							$ 0.0001			$ 0.0001
Number of voting rights to each shareholder, per share | vote							1
Total number of directors elected by holders of common stock, voting as single class, percentage							25.00%
Shares issued in transaction (in shares)							5,065,381
Additional Paid-in Capital
Class of Stock [Line Items]
Common stock warrants, net of issuance costs | $			$ 110,000,000					$ 110,000,000
Preferred stock dividends | $								$ 75,000,000