Equity-Based Compensation - NonOptions (Detail) $ / shares in Units, $ in Millions		1 Months Ended	12 Months Ended
	Nov. 04, 2024 $ / shares	Feb. 29, 2024 shares	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($)
Stericycle [Member]
Equity-Based Compensation
Grants conversion factor	0.289171
Business acquisition cost (dollars per share) | $ / shares	$ 62
Restricted Stock Units [Member]
Equity-Based Compensation
Shares issued under the plan			86,000
Unvested, Units, beginning of year			371,000
Granted, Units			237,000
Vested, Units			(122,000)
Forfeited, Units			(14,000)
Unvested, Units, end of year			472,000	371,000
Unvested, Weighted Average Per Share Fair Value, beginning of year | $ / shares			$ 139.37
Granted, Weighted Average Per Share Fair Value | $ / shares			209.86
Vested, Weighted Average Per Share Fair Value | $ / shares			119.1
Forfeited, Weighted Average Per Share Fair Value | $ / shares			163.18
Unvested, Weighted Average Per Share Fair Value, end of year | $ / shares			$ 179.25	$ 139.37
Total fair market value of vested awards | $			$ 25	$ 15	$ 15
Equity compensation tax payments (in shares)			36,000
Vesting period			3 years
Performance Share Units [Member]
Equity-Based Compensation
Potential payout (as a percent)			100.00%
Shares issued under the plan		406,000
Unvested, Units, beginning of year			881,000
Granted, Units			281,000
Vested, Units		(617,000)	(309,000)
Forfeited, Units			(24,000)
Unvested, Units, end of year			829,000	881,000
Unvested, Weighted Average Per Share Fair Value, beginning of year | $ / shares			$ 150.77
Granted, Weighted Average Per Share Fair Value | $ / shares			255.98
Vested, Weighted Average Per Share Fair Value | $ / shares			122.58
Forfeited, Weighted Average Per Share Fair Value | $ / shares			200.21
Unvested, Weighted Average Per Share Fair Value, end of year | $ / shares			$ 195.49	$ 150.77
Total fair market value of vested awards | $			$ 121	$ 74	$ 91
Vesting period			3 years	3 years
Performance Share Units [Member] | Minimum [Member]
Equity-Based Compensation
Potential payout (as a percent)			0.00%
Performance Share Units [Member] | Maximum [Member]
Equity-Based Compensation
Potential payout (as a percent)			200.00%
Total Shareholder Return Award [Member]
Equity-Based Compensation
Actual payout (as a percent)				200.00%
Cash Flow Award [Member]
Equity-Based Compensation
Actual payout (as a percent)				200.00%
Deferred Units [Member]
Equity-Based Compensation
Share-based awards outstanding (in shares)			183,000