Accumulated Other Comprehensive Loss and Shareholders' Equity - Changes in Shareholders' Equity (Deficit) (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Stockholders Equity Note [Line Items]
Cash dividends (in USD per share)	$ 0.30
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	$ 1,772	$ 1,414	$ 234	$ 430	$ 1,414	$ 430
Net income	678	377	422	(11)	1,055	411
Other comprehensive income (loss)	(323)	14	96	(155)	(309)	(59)
Dividends ($0.30 per share)	(98)
Stock-based compensation plans	43	(33)	44	(30)
Purchase of treasury stock	(300)
Balance at end of period	1,772	1,772	796	234	1,772	796
Class A Common Stock
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	$ 5	$ 5	$ 5	$ 5	$ 5	$ 5
Balance at beginning of period (in shares)	327.3	326.3	325.6	324.4	326.3	324.4
Purchase of treasury stock (in shares)	(1.9)
Stock-based compensation plans (in shares)		1.0	0.0	1.2
Balance at end of period	$ 5	$ 5	$ 5	$ 5	$ 5	$ 5
Balance at end of period (in shares)	325.4	327.3	325.6	325.6	325.4	325.6
Additional Paid-in-Capital
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	$ 5,831	$ 5,892	$ 5,787	$ 5,851	$ 5,892	$ 5,851
Stock-based compensation plans	41	(61)	43	(64)
Balance at end of period	5,872	5,831	5,830	5,787	5,872	5,830
Retained Earnings
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	10,682	10,305	9,195	9,206	10,305	9,206
Net income	678	377	422	(11)
Dividends ($0.30 per share)	(98)
Stock-based compensation plans			1
Balance at end of period	11,262	10,682	9,618	9,195	11,262	9,618
Treasury Stock, at Cost
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	(14,418)	(14,446)	(14,463)	(14,497)	(14,446)	(14,497)
Stock-based compensation plans	2	28		34
Purchase of treasury stock	(300)
Balance at end of period	(14,716)	(14,418)	(14,463)	(14,463)	(14,716)	(14,463)
Accumulated Other Comprehensive Loss
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period	(328)	(342)	(290)	(135)	(342)	(135)
Other comprehensive income (loss)	(323)	14	96	(155)
Balance at end of period	$ (651)	$ (328)	$ (194)	$ (290)	$ (651)	$ (194)