Post Employment Plans - Target Asset Allocation Ranges (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2015		Jun. 27, 2015		Jun. 28, 2014		Dec. 18, 2013	[2]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 134.9		$ 133.3	[1]	$ 99.6	[1]
Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Long-term asset allocation range, minimum	10.00%
Long-term asset allocation range, maximum	20.00%
Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Long-term asset allocation range, minimum	20.00%
Long-term asset allocation range, maximum	30.00%
Absolute return fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Long-term asset allocation range, minimum
Long-term asset allocation range, maximum	10.00%
Insurance Contract, Rights and Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Long-term asset allocation range, minimum
Long-term asset allocation range, maximum
Property [Member]
Defined Benefit Plan Disclosure [Line Items]
Long-term asset allocation range, minimum	20.00%
Long-term asset allocation range, maximum	30.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Long-term asset allocation range, minimum	30.00%
Long-term asset allocation range, maximum	40.00%
Assets [Member] | Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 15.9		16.7		20.8
Assets [Member] | Absolute return fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	33.7		34.8		29.6
Assets [Member] | Insurance Contract, Rights and Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	44.9		31.5
Assets [Member] | Property [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.8		0.4		0.8
Assets [Member] | Level 1 | Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	15.9		16.7		20.8
Assets [Member] | Level 1 | Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	39.6		49.7		48.3
Assets [Member] | Level 1 | Absolute return fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets					29.6
Assets [Member] | Level 1 | Property [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets					0.0
Assets [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	45.7		31.9	[1]	0.8	[1],[2]	$ 0.0
Assets [Member] | Level 3 | Absolute return fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.0		0.0		0.0
Assets [Member] | Level 3 | Insurance Contract, Rights and Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	44.9		31.5
Assets [Member] | Level 3 | Property [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.8		0.4		0.8
Ireland
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.0	[2]	133.3		99.6	[2]
Ireland | Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets			49.7		48.3
Ireland | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets			0.2		0.1
Ireland | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets			101.4		98.8
Ireland | Level 1 | Insurance Contract, Rights and Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets			0.0
Ireland | Level 1 | Property [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets			0.0
Ireland | Level 1 | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets			0.2		0.1
Ireland | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets			0.0		0.0
Ireland | Level 2 | Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets			0.0		0.0
Ireland | Level 2 | Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets			0.0		0.0
Ireland | Level 2 | Absolute return fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets					0.0
Ireland | Level 2 | Insurance Contract, Rights and Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets			0.0
Ireland | Level 2 | Property [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets			0.0		0.0
Ireland | Level 2 | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets			0.0		0.0
Ireland | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets			31.9		0.8
Ireland | Level 3 | Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets			0.0		0.0
Ireland | Level 3 | Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets			0.0		0.0
Ireland | Level 3 | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets			0.0		$ 0.0
Ireland | Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	134.9
Ireland | Assets [Member] | Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	39.6
Ireland | Assets [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	89.2
Ireland | Assets [Member] | Level 1 | Absolute return fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	33.7		34.8
Ireland | Assets [Member] | Level 1 | Insurance Contract, Rights and Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.0
Ireland | Assets [Member] | Level 1 | Property [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.0
Ireland | Assets [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.0
Ireland | Assets [Member] | Level 2 | Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.0
Ireland | Assets [Member] | Level 2 | Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.0
Ireland | Assets [Member] | Level 2 | Absolute return fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.0		$ 0.0
Ireland | Assets [Member] | Level 2 | Insurance Contract, Rights and Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.0
Ireland | Assets [Member] | Level 2 | Property [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.0
Ireland | Assets [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	45.7
Ireland | Assets [Member] | Level 3 | Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.0
Ireland | Assets [Member] | Level 3 | Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 0.0

[1] *Includes Omega activity from March 30, 2015 to

[2] **Includes Elan activity from December 18, 2013 to June 28, 2014.