Retirement Plans (Schedule of Fair Value of Plan Assets) (Details) - USD ($) $ in Millions		12 Months Ended
		Sep. 25, 2015	Sep. 26, 2014
Insurance Contract | Significant Unobservable Inputs (Level 3)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		$ 119.8	$ 112.0
Net unrealized gains		12.2	15.5
Net purchases, sales and issuances		(0.1)	(0.6)
Currency translation		(15.2)	(7.1)
Fair value of plan assets at end of year		116.7	119.8
Recurring
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		473.6
Fair value of plan assets at end of year		437.9	473.6
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		337.2
Fair value of plan assets at end of year		309.0	337.2
Recurring | Significant Other Observable Inputs (Level 2)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		16.6
Fair value of plan assets at end of year		12.2	16.6
Recurring | Significant Unobservable Inputs (Level 3)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		119.8
Fair value of plan assets at end of year		116.7	119.8
Recurring | U.S. Small Mid Cap
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		16.6
Fair value of plan assets at end of year		15.1	16.6
Recurring | U.S. Small Mid Cap | Quoted Prices in Active Markets for Identical Assets (Level 1)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		16.6
Fair value of plan assets at end of year		15.1	16.6
Recurring | U.S. Small Mid Cap | Significant Other Observable Inputs (Level 2)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0.0
Fair value of plan assets at end of year		0.0	0.0
Recurring | U.S. Small Mid Cap | Significant Unobservable Inputs (Level 3)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0.0
Fair value of plan assets at end of year		0.0	0.0
Recurring | U.S. Large Cap
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		50.2
Fair value of plan assets at end of year		46.2	50.2
Recurring | U.S. Large Cap | Quoted Prices in Active Markets for Identical Assets (Level 1)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		50.2
Fair value of plan assets at end of year		46.2	50.2
Recurring | U.S. Large Cap | Significant Other Observable Inputs (Level 2)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0.0
Fair value of plan assets at end of year		0.0	0.0
Recurring | U.S. Large Cap | Significant Unobservable Inputs (Level 3)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0.0
Fair value of plan assets at end of year		0.0	0.0
Recurring | International
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		39.8
Fair value of plan assets at end of year		31.0	39.8
Recurring | International | Quoted Prices in Active Markets for Identical Assets (Level 1)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		28.7
Fair value of plan assets at end of year		22.7	28.7
Recurring | International | Significant Other Observable Inputs (Level 2)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		11.1
Fair value of plan assets at end of year		8.3	11.1
Recurring | International | Significant Unobservable Inputs (Level 3)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0.0
Fair value of plan assets at end of year		0.0	0.0
Recurring | Diversified Fixed Income Funds
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	[1]	218.7
Fair value of plan assets at end of year	[1]	198.4	218.7
Recurring | Diversified Fixed Income Funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	[1]	216.6
Fair value of plan assets at end of year	[1]	196.9	216.6
Recurring | Diversified Fixed Income Funds | Significant Other Observable Inputs (Level 2)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	[1]	2.1
Fair value of plan assets at end of year	[1]	1.5	2.1
Recurring | Diversified Fixed Income Funds | Significant Unobservable Inputs (Level 3)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	[1]	0.0
Fair value of plan assets at end of year	[1]	0.0	0.0
Recurring | High Yield Bonds
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		13.0
Fair value of plan assets at end of year		11.3	13.0
Recurring | High Yield Bonds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		13.0
Fair value of plan assets at end of year		11.3	13.0
Recurring | High Yield Bonds | Significant Other Observable Inputs (Level 2)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0.0
Fair value of plan assets at end of year		0.0	0.0
Recurring | High Yield Bonds | Significant Unobservable Inputs (Level 3)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0.0
Fair value of plan assets at end of year		0.0	0.0
Recurring | Emerging Market Fund
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		9.5
Fair value of plan assets at end of year		7.4	9.5
Recurring | Emerging Market Fund | Quoted Prices in Active Markets for Identical Assets (Level 1)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		9.5
Fair value of plan assets at end of year		7.4	9.5
Recurring | Emerging Market Fund | Significant Other Observable Inputs (Level 2)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0.0
Fair value of plan assets at end of year		0.0	0.0
Recurring | Emerging Market Fund | Significant Unobservable Inputs (Level 3)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0.0
Fair value of plan assets at end of year		0.0	0.0
Recurring | Insurance Contract
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		119.8
Fair value of plan assets at end of year		116.7	119.8
Recurring | Insurance Contract | Quoted Prices in Active Markets for Identical Assets (Level 1)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0.0
Fair value of plan assets at end of year		0.0	0.0
Recurring | Insurance Contract | Significant Other Observable Inputs (Level 2)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0.0
Fair value of plan assets at end of year		0.0	0.0
Recurring | Insurance Contract | Significant Unobservable Inputs (Level 3)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		119.8
Fair value of plan assets at end of year		116.7	119.8
Recurring | Other
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		6.0
Fair value of plan assets at end of year		11.8	6.0
Recurring | Other | Quoted Prices in Active Markets for Identical Assets (Level 1)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		2.6
Fair value of plan assets at end of year		9.4	2.6
Recurring | Other | Significant Other Observable Inputs (Level 2)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		3.4
Fair value of plan assets at end of year		2.4	3.4
Recurring | Other | Significant Unobservable Inputs (Level 3)
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0.0
Fair value of plan assets at end of year		$ 0.0	$ 0.0

[1] Diversified fixed income funds consist of U.S. Treasury bonds, mortgage-backed securities, corporate bonds, asset-backed securities and U.S. agency bonds.