Accumulated Other Comprehensive Loss and Shareholders' Equity - Changes in Shareholders' Equity (Deficit) (Detail) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	$ 1,414	$ 430
Net income (loss)	377	(11)
Other comprehensive income (loss)	14	(155)
Stock-based compensation plans	(33)	(30)
Balance at end of period	1,772	234
Class A Common Stock
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	$ 5	$ 5
Balance at beginning of period (in shares)	326.3	324.4
Stock-based compensation plans (in shares)	1.0	1.2
Balance at end of period	$ 5	$ 5
Balance at end of period (in shares)	327.3	325.6
Additional Paid-in-Capital
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	$ 5,892	$ 5,851
Stock-based compensation plans	(61)	(64)
Balance at end of period	5,831	5,787
Retained Earnings
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	10,305	9,206
Net income (loss)	377	(11)
Balance at end of period	10,682	9,195
Treasury Stock, at Cost
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	(14,446)	(14,497)
Stock-based compensation plans	28	34
Balance at end of period	(14,418)	(14,463)
Accumulated Other Comprehensive Loss
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	(342)	(135)
Other comprehensive income (loss)	14	(155)
Balance at end of period	$ (328)	$ (290)