Stock-Based Compensation - Summary of Activity Related to Employee RSUs (Detail) - Restricted Share Unit Plan [Member] $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of Units, Outstanding as of December 31, 2021 | shares	118
Number of Units, Granted including DRIP | shares	61
Number of Units, Forfeited | shares	(6)
Number of Units, Outstanding as of December 31, 2022 | shares	173
Weighted Average Grant Date Fair Value, Outstanding as of December 31, 2021 | $ / shares	$ 54.64
Weighted Average Grant Date Fair Value, Granted including DRIP | $ / shares	59.31
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	56.47
Weighted Average Grant Date Fair Value, Outstanding as of December 31, 2022 | $ / shares	$ 56.23
Aggregate Intrinsic Value, Outstanding as of December 31, 2021 | $	$ 7
Aggregate Intrinsic Value, Granted including DRIP | $	4
Aggregate Intrinsic Value, Forfeited | $	0
Aggregate Intrinsic Value, Outstanding as of December 31, 2022 | $	$ 9