Earnings Per Share (Detail) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Earnings Per Share
Number of common shares outstanding at end of period (in shares)	402.6	401.1	402.6	401.1
Effect of using weighted average common shares outstanding (in shares)		0.2		0.4
Negative effect of using weighted average common shares outstanding (in shares)			(0.1)
Weighted average basic common shares outstanding (in shares)	402.6	401.3	402.5	401.5
Dilutive effect of equity-based compensation awards and other contingently issuable shares (in shares)	1.7	1.9	1.5	1.8
Weighted average diluted common shares outstanding (in shares)	404.3	403.2	404.0	403.3
Potentially issuable shares (in shares)	4.3	4.9	4.3	4.9
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding (in shares)	0.9	1.2	1.2	1.3