Share Plans (Tables)

12 Months Ended

Sep. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of the Valuation Assumptions Used in the Conversion

The weighted-average assumptions used in the Black-Scholes pricing model for shares granted in fiscal 2016, 2015 and 2014, along with the weighted-average grant-date fair value, were as follows:

	2016			2015			2014
Expected share price volatility	31		%	29		%	32		%
Risk-free interest rate	1.74		%	1.72		%	1.96		%
Expected annual dividend per share	—		%	—		%	—		%
Expected life of options (in years)	5.3			5.3			5.5
Fair value per option	$	22.82		$	30.08		$	17.38

Schedule of Share Option Activity

Share option activity and information is as follows:

	Share Options		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding at September 26, 2014	3,526,789		$	36.84
Granted	635,567		102.20
Exercised	(1,132,778	)	29.79
Expired/Forfeited	(243,135	)	58.00
Outstanding at September 25, 2015	2,786,443		52.76
Granted	1,248,828		72.44
Exercised	(413,830	)	32.76
Expired/Forfeited	(199,585	)	72.65
Outstanding at September 30, 2016	3,421,856		61.17		7.3	$	49.6
Vested and unvested expected to vest as of September 30, 2016	2,997,502		61.60		7.5	$	42.6
Exercisable at September 30, 2016	1,388,805		45.55		5.3	38.2

Share-based Compensation, Performance Shares Award Outstanding Activity

PSU activity is as follows ⁽¹⁾:

	Shares		Weighted-Average Grant-Date Fair Value
Non-vested at September 26, 2014	72,740		$	63.46
Granted	77,306		125.84
Forfeited	(19,072	)	92.05
Non-vested at September 25, 2015	130,974		96.05
Granted	145,192		83.00
Forfeited	(9,521	)	96.30
Non-vested at September 30, 2016	266,645		88.59

(1)    The number of shares disclosed within this table are at the target number of 100%.

Schedule of Share-based Payment Award, Performance Share Awards, Valuation Assumptions

The assumptions used in the Monte Carlo model for PSUs granted during each year were as follows:

	2016		2015		2014
Expected stock price volatility	41	%	27	%	28	%
Peer group stock price volatility	36	%	32	%	33	%
Correlation of returns	24	%	14	%	17	%

Schedule of Restricted Share Unit Activity

RSU activity is as follows:

	Shares		Weighted-Average Grant-Date Fair Value
Non-vested at September 26, 2014	589,222		$	47.88
Granted	273,733		105.68
Vested	(219,189	)	49.84
Forfeited	(71,272	)	68.15
Non-vested at September 25, 2015	572,494		73.45
Granted	615,074		70.10
Vested	(193,849	)	69.27
Forfeited	(99,260	)	79.95
Non-vested at September 30, 2016	894,459		70.40

The grant-date fair value of RSAs, adjusted for estimated forfeitures, is recognized as expense on a straight-line basis over the service period.

	Shares		Weighted-Average Grant-Date Fair Value
Non-vested at September 26, 2014	1,432,031		$	70.88
Vested	(1,362,823	)	70.88
Forfeited	(34,646	)	70.88
Non-vested at September 25, 2015	34,562		70.88
Vested	(9,760	)	70.88
Forfeited	(7,936	)	70.88
Non-vested at September 30, 2016	16,866		70.88