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Stockholders' Equity (Narrative) (Detail) shares in Millions, $ in Millions	12 Months Ended	14 Months Ended
	Dec. 31, 2021 USD ($) shares	Dec. 31, 2021 USD ($) shares
Equity [Abstract]
Stock repurchase program, authorized amount		$ 300
Stock repurchase program, authorized amount		600
Remaining authorized amount under stock repurchase program	$ 443	$ 443
Common stock repurchased, shares | shares	1.7	2.9
Purchase of Company, value	$ 99	$ 157

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