Changes in and Reclassification out of Accumulated Other Comprehensive Income/(Loss) by Component - Summary of Reclassification of Accumulated Other Comprehensive Loss by Component (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassification from accumulated other comprehensive income	$ (5)	$ (381)
Connect
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassification from accumulated other comprehensive income		374
Currency Translation Adjustments | Connect
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassification from accumulated other comprehensive income		233
Unrealized (Gains)/Losses on Pension Liability on Dispositions | Connect
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassification from accumulated other comprehensive income		$ 141