Share Plans - Restricted Stock Units (Detail) - Restricted Stock Units shares in Millions	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Number of shares
Beginning balance (in shares) | shares	0.6
Granted (in shares) | shares	0.3
Vested (in shares) | shares	(0.2)
Forfeited (in shares) | shares	(0.1)
Ending Balance (in shares) | shares	0.6
Weighted average grant date fair value
Beginning balance (USD per share) | $ / shares	$ 47.78
Granted (USD per share) | $ / shares	59.82
Vested (USD per share) | $ / shares	47.18
Forfeited (USD per share) | $ / shares	53.84
Ending balance (USD per share) | $ / shares	$ 53.10